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Class 12 Mathematics Trigonometric Functions AnglesExpertLevel 67

What is the principal positive angle of (-420^\circ30')?

Answer and explanation

Correct answer: (299^\circ30')

(-420^\circ30'+720^\circ=299^\circ30'). In exams, add multiples of (360^\circ) even for mixed degree-minute angles.

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trigonometric-functionsanglesdms-principalexpert

Frequently asked questions

What is the correct answer to this question?

(299^\circ30')

Why is this the correct answer?

(-420^\circ30'+720^\circ=299^\circ30'). In exams, add multiples of (360^\circ) even for mixed degree-minute angles.

Which subject and chapter does this question cover?

This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.

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