Question

Find the missing value to the nearest whole number.

cos xº = 0.39

Answer 1

1

Explanation:

cos^-1(0.39)=1.17... so i rounded to the nearest whole number, 1

Answer 2

67°

Explanation:

Apply the inverse cosine function to both sides, obtaining:

x = arccos 0.39

Using a calculator, obtain the value of x:

x = 1.17 (radians)

or

1.17 180°

x = ---------- · ------------ = 67 degrees (to the nearest whole degree)

1 π

1