trigonometry

Question: The value of $\tan 7\frac{1}{2}{}^\circ $ is equal to

1) $\sqrt{6}+\sqrt{3}+\sqrt{2}-2$

2) $\sqrt{6}-\sqrt{3}+\sqrt{2}-2$

3) $\sqrt{6}-\sqrt{3}+\sqrt{2}+2$

4) $\sqrt{6}-\sqrt{3}-\sqrt{2}-2$

Solution:

Explanation: No Solution

Trigonometric ratios of multiple and sub-multiple angles

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