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India
Class X

Angles in exact value right triangles

Interactive practice questions

Given that $\sin\theta=\frac{1}{2}$sinθ=12, we want to find the value of $\cos\theta$cosθ.

a

First, find the value of $\theta$θ.

b

Hence, find the exact value of $\cos30^\circ$cos30°.

Easy
1min

Given that $\sin\theta=\frac{1}{2}$sinθ=12, we wish to find $\tan\theta$tanθ.

Easy
1min

Given that $\cos\theta=\frac{\sqrt{3}}{2}$cosθ=32, we want to find the value of $\sin\theta$sinθ.

Easy
1min

Given that $\cos\theta=\frac{1}{2}$cosθ=12.

Easy
< 1min
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Outcomes

10.T.IT.1

Trigonometric ratios of an acute angle of a right-angled triangle. Proof of their existence (well defined); motivate the ratios, whichever are defined at 0° and 90°. Values (with proofs) of the trigonometric ratios of 30°, 45° and 60°. Relationships between the ratios.

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