Question

Calculate the length b to two decimal places.

Answer 1

any choices or

Answer 2

A. 29.84
B. 890.68
C. 36.99
D. 36

Answer 3

use the law of cosines ... given 2 sides, a,b, and the angle between them, C

c^2 = a^2 + b^2 - 2ab cos(C)

Answer 4

@amistre64 They give me lengths a, c and angle B. I plugged everything in and I got 890.68 that just don't sound right?

Answer 5

b^2 = 22^2 + 14^2 -2(14)(22) cos(110)

as a rough guess, did you sqrt for b?

Answer 6

b^2 = 890...

b = sqrt(890...)

Answer 7

No I didn't but that gives me an even higher number.

Answer 8

wait I sqaured it one min

Answer 9

Ok I got 29.84. That makes more sense! Thank you @amistre64 !

Answer 10

:) youre welcome