Q. 505.0( 2 Votes )

# Find A and B so t

Answer :

Formula: –

Given: –

y = Asin3x + Bcos3x

differentiating w.r.t x

Again differentiating w.r.t x

Now adding

But given,

12A – 6B = 10

– (12B + 6A) = 0

6A = – 12B

A = – 2B

Puttuing A

And ,

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