trigonometry

Related Questions

• Given that $\pi <\alpha <\frac{3\pi }{2},$ then the expression $\sqrt{(4{{\sin }^{4}}\alpha +{{\sin }^{2}}2\alpha )}+4{{\cos }^{2}}\left( \frac{\pi }{4}-\frac{\alpha }{2} \right)$ is equal to

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• The radius of the circle whose arc of length $15cm$ makes an angle of 3/4 radian at the centre is

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• The inradius of the triangle whose sides are 3, 5, 6, is

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• ${{\sin }^{2}}\frac{\pi }{8}+{{\sin }^{2}}\frac{3\pi }{8}+{{\sin }^{2}}\frac{5\pi }{8}+{{\sin }^{2}}\frac{7\pi }{8}=$

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• If the angles $A,B,C$ of a triangle are in A.P. and the sides $a,b,c$ opposite to these angles are in G. P. then ${{a}^{2}},{{b}^{2}},{{c}^{2}}$ are in

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