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Class 12 Mathematics Trigonometric Functions Trigonometric functions and their propertiesHardLevel 70

What is the product form of (\cos 4x-\cos 2x)?

Answer and explanation

Correct answer: (-2\sin 3x\sin x)

The formula is (\cos A-\cos B=-2\sin\frac{A+B}{2}\sin\frac{A-B}{2}). Hence the answer is (-2\sin 3x\sin x).

Tags

trigonometric-functionssum-to-productcosine

Frequently asked questions

What is the correct answer to this question?

(-2\sin 3x\sin x)

Why is this the correct answer?

The formula is (\cos A-\cos B=-2\sin\frac{A+B}{2}\sin\frac{A-B}{2}). Hence the answer is (-2\sin 3x\sin x).

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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