1.

If $\theta$ = $60^{0}$, then $\frac{1}{2}\sqrt{1+sin\theta}+\frac{1}{2}\sqrt{1-sin\theta}$ is equal to1). $cot\frac{\theta}{2}$2). $sec\frac{\theta}{2}$3). $sin\frac{\theta}{2}$4). $cos\frac{\theta}{2}$

Answer»

I THINK $cos\frac{\THETA}{2}$ is RIGHT



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