For $A = 133^\circ ,\;2\cos \frac{A}{2}$ is equal to
For $A = 133^\circ ,\;2\cos \frac{A}{2}$ is equal to
- A
$ - \sqrt {1 + \sin A} - \sqrt {1 - \sin A} $
- B
$ - \sqrt {1 + \sin A} + \sqrt {1 - \sin A} $
- C
$\sqrt {1 + \sin A} - \sqrt {1 - \sin A} $
- D
$\sqrt {1 + \sin A} + \sqrt {1 - \sin A} $
Similar Questions
$\frac{{\sin 3\theta - \cos 3\theta }}{{\sin \theta + \cos \theta }} + 1 = $
$\frac{{\sin 3\theta - \cos 3\theta }}{{\sin \theta + \cos \theta }} + 1 = $
Which of the following functions have the maximum value unity ?
Which of the following functions have the maximum value unity ?
If ${\tan ^2}\theta = 2{\tan ^2}\phi + 1,$ then $\cos 2\theta + {\sin ^2}\phi $ equals
If ${\tan ^2}\theta = 2{\tan ^2}\phi + 1,$ then $\cos 2\theta + {\sin ^2}\phi $ equals
If $a{\sin ^2}x + b{\cos ^2}x = c,\,\,$$b\,{\sin ^2}y + a\,{\cos ^2}y = d$ and $a\,\tan x = b\,\tan y,$ then $\frac{{{a^2}}}{{{b^2}}}$ is equal to
If $a{\sin ^2}x + b{\cos ^2}x = c,\,\,$$b\,{\sin ^2}y + a\,{\cos ^2}y = d$ and $a\,\tan x = b\,\tan y,$ then $\frac{{{a^2}}}{{{b^2}}}$ is equal to
If $cosA + cosB = cosC,\ sinA + sinB = sinC$ then the value of expression $\frac{{\sin \left( {A + B} \right)}}{{\sin 2C}}$ is
If $cosA + cosB = cosC,\ sinA + sinB = sinC$ then the value of expression $\frac{{\sin \left( {A + B} \right)}}{{\sin 2C}}$ is