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India
Class X

Find angles from sine, cosine and tangent measures

Interactive practice questions

If $\cos\theta=0.146$cosθ=0.146, find $\theta$θ, writing your answer to the nearest degree.

Easy
1min

If $\tan\theta=0.21$tanθ=0.21, find $\theta$θ, writing your answer to the nearest degree.

Easy
< 1min

If $\sin\theta=0.825$sinθ=0.825, find $\theta$θ, writing your answer to the nearest degree.

Easy
< 1min

If $\sin\theta=0$sinθ=0, find $\theta$θ.

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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