trigonometry

Related Questions

• Let$0<x<\frac{\pi }{4}.$Then $\sec 2x-\tan 2x=$

  ---

• In triangle $ABC,$ $\frac{1+\cos (A-B)\cos C}{1+\cos (A-C)\cos B}=$

  ---

• The solution of the equation $\begin{vmatrix} {\cos \theta } & {\sin \theta }&{\cos \theta }\\ { - \sin \theta }&{\cos \theta }&{\sin \theta }\\ { - \cos \theta }&{ - \sin \theta }&{\cos \theta } \end{vmatrix} = 0$ , is

  ---

• In a triangle $ABC$ , $\frac{2\cos A}{a}+\frac{\cos B}{b}+\frac{2\cos C}{c}=$ $\frac{a}{bc}+\frac{b}{ca}$ , then the value of angle A is

  ---

• If $x=\sec \theta +\tan \theta ,$then $x+\frac{1}{x}=$

  ---