Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of sum and difference of two and three angles
EasyThe value of $\cos 15^\circ - \sin 15^\circ$ is equal to
- A$\frac{1}{\sqrt{2}}$
- B$\frac{1}{2}$
- C$-\frac{1}{\sqrt{2}}$
- D$0$
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