Math, asked by shwaasmalhotra2005, 9 months ago

sin4A-cos4A=sin2A-cos2a

Answers

Answered by bhavana1850

1

Step-by-step explanation:

cosa sina = cosa- sina

LH.S.

cosa sina

(by using identity

at- b*= (a)? (b = (a + b)(a - b))

SO

= (cos'a + Sina) (cosa sina)

{ we know that

sina + cosa = 1)

therefore

= 1* ( cosa sin?a)

= cosa sina

= R.H.S.

Hope, it may help you, d

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