Question

Please help! Last problem! a=22, b=10, C=70 degrees. I need to solve for the unknown angle of the triangle.
B=? a. 38°50' b. 26°50' c. 72°40' d. 89°40'

Answer 1

sounds like a combo of sine and cosine law :/

Answer 2

use cosine law first to find c
then you can easily find B using law of sines

Answer 3

Is the answer b.? Can you please confirm?

Answer 4

@completeidiot

Answer 5

Use sine law and Sum of angles of a triangle is 180

Answer 6

yea

Answer 7

THANKS

Answer 8

\[\cos "B" =(a ^{2}+c ^{2}-b ^{2})/2timesa timesc\]