No registration required to write.
Trigonometry equalities, inequalities and expressions  sin, cos, tan, cot
by Guest » Fri May 10, 2013 5:25 pm
Show that the equation 3sin^(2)θ2cos^(2)θ=1
can be written as 5sin^(2)θ=3

Guest

by Math Tutor » Sun May 12, 2013 1:54 am
sin^{2}t + cos^{2}t = 1
so
cos^{2}t = 1  sin^{2}t
Can you write the rest?

Math Tutor
 Site Admin

 Posts: 410
 Joined: Sun Oct 09, 2005 11:37 am
 Reputation: 28
by Guest » Mon Dec 02, 2013 10:28 am
sinx+cosx=1

Guest

by leesajohnson » Thu Nov 24, 2016 6:13 am
sin²t + cos²t = 1

leesajohnson

 Posts: 208
 Joined: Thu Dec 31, 2015 7:11 am
 Location: London
 Reputation: 33

by Guest » Thu Nov 24, 2016 2:47 pm
You need to do the sum........not just write out the trig. identity.....
Show that the equation 3sin^2t2cos^2t=1
can be written as 5sin^2t=3
Cos^2t+Sin^2t=1 ....>>...Cos^2t=1Sin^2t
So ... 2cos^2t = 2(1Sin^2t)
and ... 3sin^2t2cos^2t = 1 ...same as... 3sin^2t2+2Sin^2t = 1 ...same as... 5Sin^2t = 3
...................................

Guest

Return to Trigonometry  sin, cos, tan, cot, arcsin, arccos, arctan, arccot
Users browsing this forum: No registered users and 2 guests