Question

Find X
Round to the nearest tenth.

Answer 1

83 degrees

Explanation:

17^2 = 8^2 + 16^2 - 2 * 8 * 16 * cos (X)

289 = 64 + 256 - 16 * 16 * cos(X)

289 = 320 - 256 cos(X)

289-320 = -256 cos(X)

- 31 = -256 cos(X)

31 = 256 cos(X)

31/256 = 256/256 cos(X)

0.121094 = cos (X)

x = arccos 0.121094

x = 83.04475538