Answer:
b) 18°, 90°, 162°, 234°, 306°

Explanation:
Given equation:

To find the solutions to the given equation between 0° and 360°, first isolate the sine term and then solve for x.
Isolate the sine term by dividing both sides of the equation by 4:

Solve for 5x by taking the arcsine of both sides of the equation, remembering that the sine function has a periodicity of 2π and is positive in quadrants I and II.

Divide both sides of the equation by 5 to solve for x:

To find the solutions for x that are in the given interval 0° < x < 360°, add integer multiples of 72° to the found solution:





Therefore, the solutions in the given interval are:
