Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
EasyWhich of the following is not correct?
- A$\cos 5 \pi = \cos 4 \pi$
- B$\sin 2 \pi = \sin (-2 \pi)$
- C$\sin 4 \pi = \sin 6 \pi$
- D$\tan 45^{\circ} = \tan (-315^{\circ})$
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