Question

PLEASE HELPPP!!!!!!!!!!!!!!!

Answer 1

Y ≈ 27.8°

Explanation:

Use (a, b, c, C) = (x, z, y, Y) and fill in the given formula.

y² = x² +z² -2xz·cos(Y)

2xz·cos(Y) = x² +z² -y²

cos(Y) = (x² +z² -y²)/(2xz) = (17² +16² -8²)/(2·17·16) = 481/544

Y = arccos(481/544) ≈ 27.848°

Y ≈ 27.8°