Find A and B so that y = A sin 3x + Bcos 3x satisfies the equation
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 ,