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Class 12 Mathematics Trigonometric Functions Trigonometric functions and their propertiesHardLevel 70

What is the correct simplified form of (\cos(\pi+x))?

Answer and explanation

Correct answer: (-\cos x)

The form (\pi+x) is linked to the third quadrant where (\cos x) is negative. Hence (\cos(\pi+x)=-\cos x).

Tags

trigonometric-functionsangle-transformationcosine

Frequently asked questions

What is the correct answer to this question?

(-\cos x)

Why is this the correct answer?

The form (\pi+x) is linked to the third quadrant where (\cos x) is negative. Hence (\cos(\pi+x)=-\cos 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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