trigonometry

Related Questions

• In $\Delta ABC,\frac{\sin (A-B)}{\sin (A+B)}=$

  ---

• In any triangle ABC ,${{\sin }^{2}}\frac{A}{2}+{{\sin }^{2}}\frac{B}{2}+{{\sin }^{2}}\frac{C}{2}$ is equal to

  ---

• $2{{\sin }^{2}}x+{{\sin }^{2}}2x=2,\,-\pi <x<\pi ,$then $x=$

  ---

• $\frac{\sqrt{2}-\sin \alpha -\cos \alpha }{\sin \alpha -\cos \alpha }=$

  ---

• The general value of $\theta $ satisfying the equation $\tan \theta +\tan \left( \frac{\pi }{2}-\theta \right)=2$, is

  ---