Evaluate the half angle of tangent for 105 degrees

The video tutorial explains how to evaluate the tangent of 105 degrees using the half angle formula. It covers the selection of the appropriate formula, calculation of the reference angle, and determination of the quadrant. The tutorial also includes a step-by-step simplification of complex fractions and emphasizes the importance of using correct trigonometric identities.

In which quadrant does 210 degrees lie, and what can you say about the signs of sine and cosine in that quadrant?

Explain how to evaluate the expression 1 minus cosine of 210 degrees over sine of 210 degrees using the half angle formula.