1.

If \[\tan \alpha =\frac{1}{7}\]and \[\sin \beta =\frac{1}{\sqrt{10}}\left( 0

A. \[\frac{\pi }{4}-\alpha \]
B. \[\frac{3\pi }{4}-\alpha \]
C. \[\frac{\pi }{8}-\frac{\alpha }{2}\]
D. \[\frac{3\pi }{8}-\frac{\alpha }{2}\]
Answer» B. \[\frac{3\pi }{4}-\alpha \]


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