Question

Given cos x=0.8248,find the degree measure of x.round your answer to the nearest tenth

Answer choices:
34.4
28.5
63.1
55.6

Answer 1

Use a calculator and type in (inv)(cos)0.8248, it will give you the reading directly.

Else, look up on the Internet for cosine tables (shown below), and look for values around 0.8248. Interpolation gives the value of 34.4 degrees.