Question

WILL GIVE BRAINLIEST!!!! ANSWER ASAP!!!!
Simplify (1 − cos x)(1 + cos x).

A) 1
B) cos^2 x
C) sin^2 x
D) tan^2 x

Answer 1

Answer:

C

Step-by-step explanation:

Brainliest please

Answer 2

Sin²x

Explanation:

Let the (1-cosx)(1+cosx) be K

So, we have  

(1-cosx)(1+cosx)=k

$K=1-cos^2 x$           ………(1)

since$(a+b)(a-b)=a^2-b^2$

Now, we will use the property of trigonometry function as we know that  

$sin^2 x+cos^2 x=1$

$sin^2 x=1- cos^2 x$

Hence ,the  value of the given express in the question is  Sin²x.