trigonometry

Related Questions

• If ${{c}^{2}}={{a}^{2}}+{{b}^{2}}$ , then $4s(s-a)(s-b)(s-c)=$

  ---

• If $\sin \theta +\sin 2\theta +\sin 3\theta =\sin \alpha $ and $\cos \theta +\cos 2\theta +\cos 3\theta =\cos \alpha $, then $\theta$ is equal to

  ---

• If $\sin \alpha =\frac{336}{625}$and $450{}^\circ <\alpha <540{}^\circ ,$ then $\sin \left( \frac{\alpha }{4} \right)=$

  ---

• If $\sin x+{{\sin }^{2}}x=1,$then ${{\cos }^{8}}x+2{{\cos }^{6}}x+{{\cos }^{4}}x=$

  ---

• If in a triangle ABC side $a=(\sqrt{3}+1)$ cms and $\angle B={{30}^{o}},$ $\angle C={{45}^{o}}$ , then the area of the triangle is

  ---