Question

Let ∠D be an acute angle such that cosD=0.33. Use a calculator to approximate the measure of ∠D to the nearest tenth of a degree. a. What is the measurement of

Answer 1

The measure of angle D to the nearest tenth of degree is 70.7°

Trigonometric functions are mathematical functions that relate angles in a right triangle to ratios of side lengths. Common functions include sine, cosine, and tangent.

The inverse of cos of a function is cos⁻¹. This is applicable for other functions.

Since cosD = 0.33

then D = cos⁻¹ 0.33

D = 70.7° ( to the nearest tenth of degree)

Therefore, the measure of angle D is 70.7