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The power rule for differentiation states that if $n$ is a real number and $f(x) = x^n$, then $f'(x) = nx^{n-1}$
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$2\tan\left(x\right)\frac{d}{dx}\left(\tan\left(x\right)\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of tan(x)^2. The power rule for differentiation states that if n is a real number and f(x) = x^n, then f'(x) = nx^{n-1}. The derivative of the tangent of a function is equal to secant squared of that function times the derivative of that function, in other words, if {f(x) = tan(x)}, then {f'(x) = sec^2(x)\cdot D_x(x)}. The derivative of the linear function is equal to 1. Any expression multiplied by 1 is equal to itself.