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# Solution - The principal solution of cos-1(-1/2) is - Inverse Trigonometric Functions - Inverse Trigonometric Functions - Principal Value Branch

ConceptInverse Trigonometric Functions Inverse Trigonometric Functions - Principal Value Branch

#### Question

The principal solution of cos^-1(-1/2) is :

(a) π/3

(b) π/6

(c) 2π/3

(d) 3π/2

#### Solution

The principal solution of cos^-1(-1/2)=  An angle in [0,π], whose cosine is -1/2

⇒ cos^-1(-1/2)=(2pi)/3

Is there an error in this question or solution?

#### APPEARS IN

2014-2015 (March)
Question 1.1.2 | 2 marks

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Solution for question: The principal solution of cos-1(-1/2) is concept: Inverse Trigonometric Functions - Inverse Trigonometric Functions - Principal Value Branch. For the courses HSC Arts, HSC Science (Computer Science), HSC Science (Electronics), HSC Science (General)
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