As Agent Trigonometry, you are given the following cryptic clue. How could you simplify this clue?
We can also use the double-angle and half-angle formulas to simplify trigonometric expressions.
Solution: Use and then factor.
Find the formula for .
Solution: You will need to use the sum formula and the double-angle formula.
We will explore other possibilities for the because of the different formulas for in the Problem Set.
Verify the identity .
Solution: Simplify the left-hand side use the half-angle formula.
Concept Problem Revisit
Use and then factor.
1. Simplify .
2. Verify .
Simplify the following expressions.
Verify the following identities.