Question

(SIN A-COS A)'2=1-SIN 2A​

Answer 1

Answer:

sinA*2+cosA*2-2cosAsinA

1-2cosAsinA

1-2sinA

Step-by-step explanation:

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Answer 2

Answer:

( sinA - cos A ) ^ 2

= sin^2 A + cos^2 A - 2 sin A cos A

= 1 - 2 sin A cos A

(as sin^2A + cos^A = 1)

= 1 - sin 2A

(as 2 sin A cos A = sin 2A)