Simplify cos(theta)^2-sin(theta)^2

Problem

cos2(θ)−sin2(θ)

Solution

1. Identify the expression as a standard trigonometric form.

2. Apply the double angle identity for cosine, which states that cos(2*θ)=cos2(θ)−sin2(θ)

3. Substitute the identity to simplify the expression to its most compact form.

Final Answer

cos2(θ)−sin2(θ)=cos(2*θ)

Want more problems? Check here!