I'd first try to rewrite the numerator using an angle sum identity. After that, I'd differentiate.Hello, does anyone know how to prove question 30 ( a)
I only know how to solve up to that step
Sorry,I don’t know how to start. I’m supposed to write numerator as 3 sin ( x+x) + 4 cos (x+x) ?I'd first try to rewrite the numerator using an angle sum identity. After that, I'd differentiate.
No. You might have learned something about how to write [imath]a\sin(x) + b\cos(x)[/imath] as [imath]c\cos(x + d)[/imath]. But if not, then work backward! That's what I did.Sorry,I don’t know how to start. I’m supposed to write numerator as 3 sin ( x+x) + 4 cos (x+x) ?