January 28, 2015

Homework Help: trigonometry

Posted by Jad on Sunday, January 16, 2011 at 1:09am.

---I asked this question

Solve the following right triangles:
a. a=117 ft, b=16.35 ft
b. B=8 degrees 29',and a=32.8 ft

Reiny was kind enough to post this reply.

"solving" a triangle involves finding all missing sides and angles, so in
a) you found the sides, but still no angle.
tan B = 16.35/117 = 0.13974
angle B = 7.96
subtract from 90 to find angle A

b) angle B = 8 29' = (8+29/60) = 8.48333

tan 8.48333 = b/32.8
b= 4.892

now use Pythagoras to find the third side, and subtract angle B from 90 to get angle A

---but i am still having trouble with understanding the question and how the answers she posted were found .If u can explain to me in more details that would be great

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