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 to 57°. a. 0.98 b. 0.13 c. -0.01 d. 0.84 please select the best answer from the choices provided

Explanation:

Step1: Find the complementary angle

Complementary angles add up to 90°. So the complementary angle to 57° is $90 - 57=33^{\circ}$.

Step2: Calculate the cosine value

Using a calculator, $\cos(33^{\circ})\approx0.84$.

Answer:

D. 0.84