MCQ
$\tan 15^{\circ}=?$
- A$\frac{(\sqrt{2}+1)}{(\sqrt{2}-1)}$
- B$\frac{(\sqrt{3}+1)}{(\sqrt{3}-1)}$
- C$\frac{(\sqrt{3}-1)}{(\sqrt{3}+1)}$
- D$\frac{(\sqrt{2}-1)}{(\sqrt{2}+1)}$
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If $\tan\text{A}=\frac{1}{2},\tan\text{B}=\frac{1}{3},$ then $\tan(2\text{A + B})$ is equal to:
The real value of $\theta$ for which the expression $\frac{1+\text{i}\cos\theta}{1-2\text{i}\cos\theta}$ is a real number is:
$\text{n}\pi+\frac{\pi}{4}$
$\text{n}\pi+(-1)^{\text{n}}\frac{\pi}{4}$
$2\text{n}\pi\pm\frac{\pi}{2}$
None of these.