Question

Show that 2cos^2theta - 1 = cos^2theta - sin^2theta​

Answer 1

Answer:

Step-by-step explanation:Given: Prove  

sin

2

θ

−

cos

2

θ

=

1

−

2

cos

2

θ

Use the Pythagorean Identity:  

 

sin

2

θ

+

cos

2

θ

=

1

Rearrange the identity:  

 

sin

2

θ

=

1

−

cos

2

θ

Start with the left side of the equation and substitute the rearranged identity:

sin

2

θ

−

cos

2

θ

=

1

−

cos

2

θ

−

cos

2

θ

Combine like-terms:

=

1

−

2

cos

2

θ

This is the right-side

Answer 2

Here's your answer buddy

ere's your answer buddymark as BRAINLIEST