trigonometry

Related Questions

• If in a triangle ABC, angle C is ${{45}^{o}}$ , then $(1+\cot A)(1+\cot B)=$

  ---

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

  ---

• If in a triangle $ABC$ , $\angle C={{60}^{o}},$ then $\frac{1}{a+c}+\frac{1}{b+c}=$

  ---

• $ABC$ is a right angled isosceles triangle with $\angle B={{90}^{o}}$. If D is a point on $AB$ so that $\angle DCB={{15}^{o}}$ and if $AD=35cm$ , then $CD=$

  ---

• Common roots of the equations $2{{\sin }^{2}}x+{{\sin }^{2}}2x=2$ and $\sin 2x+\cos 2x=\tan x,$ are

  ---