trigonometry

Related Questions

• The value of $\cot {{70}^{o}}+4\cos {{70}^{o}}$ is

  ---

• The expression ${{\cos }^{2}}(A-B)+{{\cos }^{2}}B-2\cos (A-B)\cos A\cos B$ is

  ---

• The value of $\frac{\tan {{70}^{o}}-\tan {{20}^{o}}}{\tan {{50}^{o}}}=$

  ---

• If $r\,\sin \theta =3,r=4(1+\sin \theta ),\,\,0\le \theta \le 2\pi ,$then $\theta =$

  ---

• If $\cos \theta +\cos 2\theta +\cos 3\theta =0$, then the general value of $\theta $ is

  ---