The Trigonometric Functions (HSC SSCE Mathematics Advanced): Quizzes

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The Behaviour of sin x Near the Origin
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What is the gradient of y=sinxy = \sin x as it passes through the origin?

11

For acute angles xx, which inequality is correct?

sinx<x<tanx\sin x < x < \tan x

For π2<x<0-\frac{\pi}{2} < x < 0, which inequality is correct?

sinx>x>tanx\sin x > x > \tan x

What is limx0sinxx\lim_{x \to 0} \frac{\sin x}{x}?

11

Which line is tangent to both y=sinxy = \sin x and y=tanxy = \tan x at the origin?

y=xy = x

For small angles in radians, sinx\sin x is approximately equal to what?

xx

For small angles in radians, cosx\cos x is approximately equal to what?

11

In which unit must angles be expressed for small-angle approximations to work?

Radians

In the geometric proof, which areas are compared?

Two triangles and a sector

What is limx0tanxx\lim_{x \to 0} \frac{\tan x}{x}?

11

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