Pre-Calculus - Find the Double Angle of Tangent When Given a Triangle with Restrictions

The video tutorial covers solving a trigonometry problem involving angles not on the unit circle. The teacher explains how to determine the quadrant of an angle, construct a triangle, and calculate trigonometric functions like sine and cosine using specific formulas. The process includes identifying the correct quadrant, using the Pythagorean triple, and simplifying expressions to find the final result.

How do you evaluate the sine of half an angle using the cosine of the angle?

Describe the process of rationalizing the denominator in a trigonometric expression.