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Class 12 Mathematics Trigonometric Functions Trigonometric functions and their propertiesEasyLevel 72

What is (\cos(\pi+x)) equal to?

Answer and explanation

Correct answer: (-\cos x)

(\pi+x) is in the third quadrant and (\cos x) is negative there. Therefore, (\cos(\pi+x)=-\cos x).

Tags

allied-anglescosinequadrants

Frequently asked questions

What is the correct answer to this question?

(-\cos x)

Why is this the correct answer?

(\pi+x) is in the third quadrant and (\cos x) is negative there. Therefore, (\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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