Using the the half angle formula for sine to evaluate

The video tutorial explores breaking down trigonometric expressions using sum, difference, and half-angle formulas. It focuses on applying the half-angle formula to evaluate the sine of 95 degrees, determining the reference angle, and understanding the sign based on the quadrant. The tutorial also covers calculating the cosine of 30 degrees and simplifying the resulting expression.

What is the formula used to evaluate sine using half angle formulas?

What is the cosine of 30 degrees?