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$\frac{1-\tan^2 30^\circ}{1 + \tan^2 30^\circ}$ is equal to :
- (a)$\sin 60^\circ$
- (b)$\cos 60^\circ$
- (c)$\tan 60^\circ$
- (d)$\cos 30^\circ$
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(b) $\cos 60^\circ$
1- 2 30°/1 + 2 30° is equal to :
CBSE Class 10 Maths PYQ · Trigonometry · Specific Angles Expression · 1 Mark · March 2023 · Standard
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