Question

Simplify (1 − sin x)(1 + sin x).

Answer 1

1

cos² x

sin² x

tan² x

Answer 2

Hint: (a-b)(a+b) = a^2 - b^2. This is called a "special product."

Answer 3

Therefore, (1-sin x)(1+sin x) = ?

Answer 4

(1 - sin x)(1 + cos x) = 1 - sin^2 x = cos^2 x