Question

show that it is not an identity cos²+cos=1​

Answer 1

Answer:

no

Step-by-step explanation:

above the answer of the question

Answer 2

Answer:

HOPE THIS BRING A SMILE IN YOUR FACE

Step-by-step explanation:

We know that,

sin^2+cos^2=1

cos^2=1-sin^2---------☆

Given identity is,

cos^2+cos=1

cos^2=1-cos-----------♡

From ☆ and♡

1-sin^2=1-cos

1+1=sin^2-cos

2=sin^2-cos

But there is no identity proving the above equation,

Therefore cos^2+cos us not equal to 1.