Derivatives of Circular Functions (VCE SSCE Mathematical Methods): Quizzes

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Derivatives of Circular Functions
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What is the derivative of sin⁡(kθ)\sin(k\theta) with respect to θ\theta?

kcos⁡(kθ)k\cos(k\theta)

What is the derivative of cos⁡(kθ)\cos(k\theta) with respect to θ\theta?

−ksin⁡(kθ)-k\sin(k\theta)

What is the derivative of tan⁡(kθ)\tan(k\theta) with respect to θ\theta?

ksec⁡2(kθ)k\sec^2(k\theta)

What is the value of lim⁡θ→0sin⁡θθ\lim_{\theta \to 0} \frac{\sin \theta}{\theta}?

11

How is the secant function sec⁡θ\sec \theta defined?

1cos⁡θ\frac{1}{\cos \theta}

What is ddθ[sin⁡2(2θ)]\frac{d}{d\theta}[\sin^2(2\theta)]?

4sin⁡(2θ)cos⁡(2θ)4\sin(2\theta)\cos(2\theta)

What is ddθ[cos⁡3(4θ+1)]\frac{d}{d\theta}[\cos^3(4\theta+1)]?

−12cos⁡2(4θ+1)sin⁡(4θ+1)-12\cos^2(4\theta+1)\sin(4\theta+1)

What is ddθ[tan⁡(3θ2+1)]\frac{d}{d\theta}[\tan(3\theta^2+1)]?

6θsec⁡2(3θ2+1)6\theta \sec^2(3\theta^2+1)

Which complementary angle identity is correct?

cos⁡θ=sin⁡(π2−θ)\cos \theta = \sin(\frac{\pi}{2}-\theta)

For y=tan⁡θy = \tan \theta, what is the gradient at θ=π4\theta = \frac{\pi}{4}?

22

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