trigonometry

Related Questions

• ${{\cos }^{2}}48{}^\circ -{{\sin }^{2}}12{}^\circ =$

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• If $A+B=\frac{\pi }{4},$then $(1+\tan A)(1+\tan B)=$

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• If $\sin \theta =\frac{-4}{5}$ and $\theta $ lies in the third quadrant, then $\cos \frac{\theta }{2}=$

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• If $\sin 2\theta =\cos 3\theta $and $\theta $is an acute angle, then $\sin \theta $is equal to

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• A ladder 5 metre long leans against a vertical wall. The bottom of the ladder is 3 metre from the wall. If the bottom of the ladder is pulled 1 metre farther from the wall, how much does the top of the ladder slide down the wall

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