Question

How do you differentiate 2cos(x)+cos2(x)?

Answer 1

✨ Step-by-step explanation:

We have to differentiate,

d[2cos(x)+ cos2(x)]/dx

Now, it will be

= 2 d(cos x)/dx + d(cos 2x)/dx

= 2(-sinx) + (-sin 2x) × d(2x)/dx

= -2 sinx-2 sin2x

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