How to solve a trigonometric equation zero product property

The video tutorial covers solving trigonometric equations involving tangent and cosine. It begins by setting equations to zero and explores angles where tangent equals -1, specifically at 3π/4 and 7π/4. The tutorial also identifies when cosine equals -1, which occurs at π. The explanations include references to the unit circle and the properties of trigonometric functions.

What angles on the unit circle correspond to a tangent value of -1?

Explain why the tangent of theta is negative in the fourth quadrant.

What is the reference angle for tangent values of -1?

Identify the angles where tangent equals -1 and explain their significance.

At which angle is the cosine of theta equal to -1?