Question

Find x.
a. 30.9
b. 34.4
c. 17.1
d. 15.4

Answer 1

x = 17.1

Explanation:

Since this is a right triangle, we can use trig functions

cos theta = adj / hyp

cos 42 = x/23

23 cos 42 = x

17.09233 =x

Rounding to 1 decimal place

x =17.1