9:15 PM ,

Find the values of x, where 0 ≤ x ≤ 360, such that 2sin^2 x + 5cosx + 1 = 0.

Problem Statement:

Find the values of x, where 0 ≤ x ≤ 360, such that 2sin2x + 5cosx + 1 = 0.

Problem Answer:

x = 120° or 240°

Solution: