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If $sin\alpha sec(30^{0}+ \alpha)$ = 1, $(0 < \alpha < 60^{0})$, then the value of $sin\alpha + cos2\alpha$ is1). 12). $\frac{2+\sqrt{3}}{2\sqrt{3}}$3). 04). $\sqrt{2}$ |
Answer» 1 : - is CORRECT HENCE OPTION 1 | |