Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
Easy$\sin 15^\circ + \cos 105^\circ = $
- A$0$
- B$2\sin 15^\circ $
- C$\cos 15^\circ + \sin 15^\circ $
- D$\sin 15^\circ - \cos 15^\circ $
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