Question

Sin square A minus sin square A minus 2 Sin ^ 4 a ^ 4 a minus cos square A is equal to 1

Answer 1

Answer:

Your question can't be understood properly.maybe this is your answer...

We know that the following trigonometry identities cos²A

+ sin²A = 1

apply to any real value A.

Squaring the two segments of the trigonometric identities above will be obtained

(cos²A + sin²A) ² = 1²

<=> (cos²A) ² + 2 cos²A sin²A + (sin²A) ² = 1

<=> cos⁴A + 2 sin²A cos²A + sin⁴A = 1

<=> cos⁴A + sin⁴A = 1 - 2 sin²A cos²A.