Differentiation of trigonometric functions and differentiation rules — Question 158

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QUESTION 158

The graph of $y=\sin(2x)$ is shown with the point $x=\dfrac{\pi}{8}$ marked. The gradient of the tangent at this point is

(A)

$\dfrac{\sqrt2}{2}$

(B)

$1$

(C)

$\sqrt2$

(D)

$2$

ABCD

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