Question

PERIODIC FUNCTIONS AND TRIGONOMETRY FOR 25 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!

EXPLAIN THIS!!!!!!!!!!!

On a separate piece of paper sketch a unit circle with angle 0 in standard position.

For what values of θ is the sine increasing? Decreasing?
For what values of θ is the cosine increasing? Decreasing?
For which angle between 0° and 360° is sine equal to 0? Where is cosine equal to 0?

Answer 1

The sine increases from 0 to 90 degrees and from 270 to 360 degrees
The sine decreases from 90 to 270 degrees

The cosine increases from 180 to 360 degrees
The cosine decreases from 0 to 180 degrees

Sine = 0 at 0 and 180 degrees

Cosine = 0 at 90 and 270 degrees