Question

(cosA +sinA)²-(cosA-sinA)² is equal to​

Answer 1

Answer:

4 cosA sinA

Step-by-step explanation:

(cos^2A+sin^2A+2cosA sinA) - (cos^2A+sin^2A-2cosAsinA)

cos^2A+sin^2A+2cosA sinA-cos^2A-sin^2A+2cosAsinA

4 cosAsinA