Question

Find angle A in the following triangle.
Answers,
45.6 degrees
54.5 degrees
40.5 degrees
41.2 degrees

Answer 1

use cosine rule

Answer 2

cos(A)=(b^2+c^2-A^2)/2bc , where A is angle in deg , b, a,c are the side's length

Answer 3

that's equal to 40 deg and 32 mins 8 sec

Answer 4

Amrmagdy what did you get?

Answer 5

and equal two 40.5 deg the third choice

Answer 6

yep i agree!! 40.5

Answer 7

Thanks bra

Answer 8

urw :)

Answer 9

Thanks physicsboffin

Answer 10

:)