trigonometry

Related Questions

• Maximum value of $f(x)=\sin x+\cos x$ is

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• If the line segment joining the points $A(a,\,b)$ and $B(c,\,d)$ subtends an angle $\theta $ at the origin, then $\cos \theta $ is equal to

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• If $\cos x+\cos y+\cos \alpha =0$ and $\sin x+\sin y+\sin \alpha =0,$ then $\cot \,\left( \frac{x+y}{2} \right)=$

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• The minimum value of $\cos \theta +\sin \theta $ is

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• If $A+B+C=\frac{3\pi }{2},$ then $\cos 2A+\cos 2B+\cos 2C=$

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