rosey7771 rosey7771
  • 18-11-2019
  • Mathematics
contestada

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

Respuesta :

erica2101763
erica2101763 erica2101763
  • 18-11-2019

Answer:

C

Step-by-step explanation:

Brainliest please

Answer Link
nandhini123
nandhini123 nandhini123
  • 22-11-2019

Sin²x

Explanation:

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

So, we have  

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

[tex]K=1-cos^2 x[/tex]           ………(1)

since[tex](a+b)(a-b)=a^2-b^2[/tex]

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

[tex]sin^2 x+cos^2 x=1[/tex]

[tex]sin^2 x=1- cos^2 x[/tex]

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

Answer Link

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