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Trigonometry equalities, inequalities and expressions - sin, cos, tan, cot
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- Calculate sin 15 + sin 75 = ?
by Math Tutor » Sun May 09, 2010 3:51 am
- 4 Replies
- 85694 Views
- Last post by Vicenta
Mon Jul 25, 2016 8:31 am
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- Question about Articles in S. L. Looney book "Plane Trig
by KarimTef » Wed Jul 20, 2016 6:05 pm
- 2 Replies
- 1526 Views
- Last post by KarimTef
Fri Jul 22, 2016 6:13 am
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- Find out an angle
by burgess » Wed Jul 23, 2014 7:02 am
- 6 Replies
- 6402 Views
- Last post by Guest
Tue May 31, 2016 7:23 pm
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- sin,cos,tan
by babyj » Wed Nov 28, 2007 6:17 pm
- 6 Replies
- 5270 Views
- Last post by Guest
Sat Apr 16, 2016 2:57 pm
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- Need help with a problem
by Guest » Sun Feb 07, 2016 11:16 am
- 5 Replies
- 1498 Views
- Last post by Guest
Wed Mar 30, 2016 6:53 pm
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- Solar Declination Part 2
by Guest » Thu Jan 07, 2016 7:51 pm
- 1 Replies
- 1774 Views
- Last post by Guest
Sat Jan 09, 2016 12:43 pm
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- (1-sinA+cosA)/(sinA+cosA-1)=(1+cosA)/sinA
by Guest » Tue Dec 22, 2015 4:13 am
- 2 Replies
- 2510 Views
- Last post by Guest
Tue Dec 22, 2015 3:40 pm
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- Calculate the trigonometric sum
by Guest » Sat Dec 19, 2015 11:19 am
- 2 Replies
- 1856 Views
- Last post by Guest
Tue Dec 22, 2015 4:13 am
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- Trigonometry word problem help!
by Guest » Wed Jun 24, 2015 7:40 pm
- 1 Replies
- 2115 Views
- Last post by Guest
Sat Jun 27, 2015 6:24 am
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- sin cos
by yppetrov » Sat Dec 16, 2006 3:02 am
- 4 Replies
- 5450 Views
- Last post by Guest
Thu Mar 05, 2015 7:30 am
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- When should I set + , - or ±
by charin79 » Mon Mar 10, 2008 12:41 am
- 4 Replies
- 3044 Views
- Last post by Guest
Sat Jan 03, 2015 6:14 am
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- Trignometry
by bharath vb » Mon Sep 08, 2014 2:49 am
- 0 Replies
- 1799 Views
- Last post by bharath vb
Mon Sep 08, 2014 2:49 am
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- Arc length
by Guest » Sun Jun 08, 2014 11:57 am
- 1 Replies
- 1565 Views
- Last post by Guest
Mon Jun 09, 2014 6:29 am
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- Find angles in triangle if given one side and bearings
by Guest » Tue Apr 22, 2014 11:41 pm
- 2 Replies
- 2414 Views
- Last post by jackwilson
Fri May 30, 2014 2:26 am
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- Greatest value of sin*sin*sin
by MM » Fri Mar 06, 2009 1:05 pm
- 4 Replies
- 3593 Views
- Last post by Math Tutor
Wed Nov 13, 2013 2:21 pm
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- Verify identity - need to help a student work through this
by Guest » Tue Nov 05, 2013 10:41 pm
- 2 Replies
- 1365 Views
- Last post by Guest
Fri Nov 08, 2013 5:28 am
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- Numerical value of one trigonometric function
by Guest » Sun Oct 27, 2013 12:35 pm
- 2 Replies
- 2449 Views
- Last post by Math Tutor
Sun Oct 27, 2013 2:20 pm
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- cos(A-B)=cosAcosB + sinAsinB
by Guest » Sat Dec 31, 2011 5:13 am
- 1 Replies
- 13027 Views
- Last post by adamsmith
Thu Sep 05, 2013 6:18 am
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- Determine Reference point for Pentagram
by stockgoblin » Tue Jun 18, 2013 11:27 am
- 0 Replies
- 1217 Views
- Last post by stockgoblin
Tue Jun 18, 2013 11:27 am
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- Trigonometric Identity
by Guest » Thu Mar 14, 2013 4:42 pm
- 1 Replies
- 1410 Views
- Last post by Guest
Fri Mar 15, 2013 6:26 am
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- Trigonometric equation: |sinx + cosx| = 1
by Guest » Sat May 19, 2012 6:15 am
- 0 Replies
- 1642 Views
- Last post by Guest
Sat May 19, 2012 6:15 am
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- The Cosine Curve - cos 20, cos 85
by Guest » Sat Apr 28, 2012 1:05 pm
- 2 Replies
- 2382 Views
- Last post by Guest
Wed May 02, 2012 3:06 am
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- Trigonometry Word Problem with an Airplane.
by kingkos » Tue Dec 06, 2011 12:04 pm
- 0 Replies
- 3195 Views
- Last post by kingkos
Tue Dec 06, 2011 12:04 pm
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- Trigonometry Word Problem
by kingkos » Tue Dec 06, 2011 12:02 pm
- 0 Replies
- 2057 Views
- Last post by kingkos
Tue Dec 06, 2011 12:02 pm
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- Trigonometric equation with tan, find x
by Guest » Fri Oct 07, 2011 8:58 am
- 0 Replies
- 1290 Views
- Last post by Guest
Fri Oct 07, 2011 8:58 am
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- Trigonometry: calculate sin^4 \alpha - cos^4 \alpha = 0
by kate » Fri Jul 04, 2008 11:59 am
- 1 Replies
- 3521 Views
- Last post by Guest
Wed Sep 28, 2011 8:34 am
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- Help i need to know what cos6x equals
by gravy3000 » Mon Dec 15, 2008 5:55 pm
- 5 Replies
- 7177 Views
- Last post by Guest
Wed Sep 28, 2011 3:53 am
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- How sec and cosec are defined?
by sec cosec » Wed Jan 12, 2011 10:28 am
- 3 Replies
- 2201 Views
- Last post by Guest
Tue Sep 13, 2011 9:17 am
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- Find value of a. if tan 5a^2.cot(90+3a^2)
by Guest » Sun Aug 28, 2011 12:15 am
- 0 Replies
- 1217 Views
- Last post by Guest
Sun Aug 28, 2011 12:15 am
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- Prove that if 4sin e+4cos^2 e-5=0 then sin e = 1/2
by nisarg » Wed Aug 17, 2011 12:10 pm
- 1 Replies
- 1573 Views
- Last post by Guest
Thu Aug 18, 2011 1:03 am
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- Trigonometric equation - a*sinx*cosx=sinx-cosx
by Math Tutor » Mon Jul 18, 2011 5:13 am
- 0 Replies
- 1553 Views
- Last post by Math Tutor
Mon Jul 18, 2011 5:13 am
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- Trigonometry - tan(a) + cot(a) = b
by Trigonometry » Wed May 25, 2011 6:44 am
- 4 Replies
- 1743 Views
- Last post by Guest
Tue Jun 07, 2011 9:05 am
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- Find the value of 2sin(alpha)*cos(alpha)
by sin cos » Tue Mar 15, 2011 9:14 am
- 3 Replies
- 2926 Views
- Last post by Guest
Sun Jun 05, 2011 6:31 am
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- arctan
by Eric » Mon Jan 24, 2011 9:10 am
- 1 Replies
- 1301 Views
- Last post by 10 grade
Tue Jan 25, 2011 9:48 am
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- Trigonometric identities
by Rachel » Tue Sep 07, 2010 3:24 am
- 1 Replies
- 6348 Views
- Last post by Math Tutor
Tue Sep 07, 2010 4:45 am
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- Prove that: tg20.tg40.tg60.tg80 = 3
by Math Tutor » Mon Dec 21, 2009 11:50 am
- 1 Replies
- 6830 Views
- Last post by mrmohamed
Sat Jan 09, 2010 5:53 am
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- Difficult trigonometric inequality
by Math Tutor » Thu Jan 03, 2008 9:47 am
- 1 Replies
- 3836 Views
- Last post by dduclam
Sun May 04, 2008 4:53 am
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- Still sin.cos and tan but different problems
by babyj » Mon Dec 03, 2007 6:32 pm
- 1 Replies
- 4079 Views
- Last post by Math Tutor
Tue Dec 04, 2007 5:15 am
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- Cos function
by Guest » Mon Aug 23, 2021 6:44 am
- 0 Replies
- 0 Views
- Last post by Guest
Wed Dec 31, 1969 8:00 pm
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- Making a formula that finds the horizontal and vertical dist
by Guest » Tue Apr 23, 2019 11:55 pm
- 0 Replies
- 0 Views
- Last post by Guest
Wed Dec 31, 1969 8:00 pm
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- Making a formula that finds the horizontal and vertical dist
by Guest » Tue Apr 23, 2019 11:55 pm
- 0 Replies
- 0 Views
- Last post by Guest
Wed Dec 31, 1969 8:00 pm
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- Making a formula that finds the horizontal and vertical dist
by Guest » Tue Apr 23, 2019 11:55 pm
- 0 Replies
- 0 Views
- Last post by Guest
Wed Dec 31, 1969 8:00 pm
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