Question

Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.

The cosine of the complimentary angle of 60°.

a.

0.50

c.

0.25


b.

0.86

d.

0.71

Answer 1

0.86

Explanation:

Answer 2

The complementary angle of 60° is 30°

cos(30°) = (√3)/2 ==> cos30°=0.86 (or b.)