Which expression is equivalent to

(sin x + 1) (sin x - 1) ?

A.) cos^2x

B.) - cos^2x

C.) cos^2x + 1

D.) cos^2x - 1

E.) - cos^2x + 1

Question

Isla Osborn

26 February, 22:31

+3

Answers (2)

Know the Answer?

Jovan Madden · Answer 1

B.

sin^2x + cos^2x = 1

hence Sin^2x-1 = - cos^2x

Maurice Russell · Answer 2

Maurice Russell 27 February, 01:48

0

Sin^2x - 1 = - cos^2x ...

Which expression is equivalent to(sin x + 1) (sin x - 1) ?A.) cos^2xB.) - cos^2xC.) cos^2x + 1D.) cos^2x - 1E.) - cos^2x + 1