Class 11 Mathematics Trigonometrical Ratios, Functions and Identities Trigonometrical ratios of multiple and sub-multiple angles

Easy

If $2\cos^2 \theta - 2\sin^2 \theta = 1$,then $\theta = \dots ^\circ$.

A
$15$
B
$30$
C
$45$
D
$60$

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Class 11 Questions

Class 11

Mathematics Questions

Chapter

Trigonometrical Ratios, Functions and Identities

Subtopic

Trigonometrical ratios of multiple and sub-multiple angles

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