sin,cos,tan

by **babyj** » Wed Nov 28, 2007 6:17 pm

Every time that i do sin,cos or tan in my calculator its the wrong answer. I dont know what it is thats making me get the wrong answer but can somebody help me with how to set it up please?

by **Math Tutor** » Thu Nov 29, 2007 4:11 am

Could you write the problem here, please?

by **babyj** » Thu Nov 29, 2007 6:03 pm

Well i have a triangle and the hyp is 15 and one of the angles is 68 one is 90. I dint know how to get another side with just that. Could you help me?

by **Math Tutor** » Fri Nov 30, 2007 4:29 am

So you should use Sine Rule

Always when we have in one triangle 2 angles and one side and search for another side we use Sine Rule.

we have:

$\frac{a}{sin(A)} = \frac{b}{sin(B)}$

here we know angles A and B
and the one side too

so the other side is:

$a = \frac{b.sin(A)}{sin(B)}$

Do you understand?

by **babyj** » Fri Nov 30, 2007 6:01 pm

Yes i do thank you :lol:

sin,cos,tan

sin,cos,tan

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