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How do you find the derivative of sin2(2x) .

Answer
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Hint: We will use different differentiation rules and formulas to solve the given question. As the given function is a composite function so we will use the chain rule to find the derivative. First we will differentiate the function by using power rule ddx(xn)=n×xn1 then we will use ddx(sinx)=cosx .

Complete step by step answer:
We have been given a function sin2(2x) .
We have to find the derivative of the given function.
Now let us assume that y=sin2(2x)
Now, differentiating the given function with respect to x we will get
 dydx=ddx(sin2(2x))
Now, the given function is a composite function so we need to apply the chain rule.
Now, we know that ddx(xn)=n×xn1
Applying the formula in the above equation we will get
 dydx=2sin2xddx(sin(2x))
Now, we know that ddx(sinx)=cosx
Applying the formula in the above-obtained equation we will get
 dydx=2sin2x.cos2xddx2x
Taking the constant term out we will get
 dydx=2sin2x.cos2x×2ddxx
Now, we know that ddxx=1
Applying the formula in the above-obtained equation we will get
 dydx=2sin2x.cos2x×2
Now, solving further we will get
 dydx=4sin2x.cos2x
Hence we get the derivative of sin2(2x) as 4sin2x.cos2x .

Note:
We can also further simplify the obtained differentiation value by using trigonometric identities and formulas. Also do not get confused between the product rule and chain rule of the differentiation. The product rule is applied when one function is multiplied by another function. We cannot directly differentiate the product of functions or a composite function.