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Class 12 Mathematics Trigonometric Functions Trigonometric functions and their propertiesHardLevel 70

What is (\cos^2 x-\sin^2 x) equal to?

Answer and explanation

Correct answer: (\cos 2x)

The double angle identity is (\cos 2x=\cos^2 x-\sin^2 x). In exams, remember all three forms of (\cos 2x).

Tags

trigonometric-functionsdouble-anglecosine

Frequently asked questions

What is the correct answer to this question?

(\cos 2x)

Why is this the correct answer?

The double angle identity is (\cos 2x=\cos^2 x-\sin^2 x). In exams, remember all three forms of (\cos 2x).

Which subject and chapter does this question cover?

This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Trigonometric functions and their properties.

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