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📈 Optional Mathematics - Class 10
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Lesson 7: Height and Distance
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Multiple Angles
Lesson 7 · Height and Distance
Multiple Angles
Optional Mathematics
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8 min
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Question 1 of 15
1
Which expression is equal to cos 2A?
\( \cos^2 A + \sin^2 A \)
\( \cos^2 A - \sin^2 A \)
\( 1 - 2\cos^2 A \)
\( 2\sin^2 A - 1 \)