Make the given changes in the indicated examples of this section and then find the indicated values. In Example 4, change cos to sin and

Make the given changes in the indicated examples of this section and then find the indicated values.

In Example 4, change cosθ to sinθ and then find the angle.

Data from Example 4

If cosθ = 0.3527, which means that θ = cos⁻¹ 0.3527 (θ is the angle whose cosine is 0.3527), we can use a calculator to find θ. The display is shown in Fig. 4.22. Therefore, θ = 69.35° (rounded off).

NORMAL FLOAT AUTO REAL DEGREE MP cos(.3527) 0 69.34745162 Fig. 4.22