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91Ó°ÊÓ

Find the exact value of the expression. Express angles in radians.

sin-1-22

Short Answer

Expert verified

The exact value of the given expression is -Ï€4.

Step by step solution

01

Step 1. Given information.

Consider the given question,

sin-1-22

Assume θ=sin-1-22

As y=sin-1xmeans x=siny, where,

-π2≤θ≤π2

Rewrite the function,

sinθ=-22

02

Step 2. Determine the interval.

The only angle θwithin the interval -π2,π2whose sine is -22is given below,

-Ï€4

Then, we can say,

localid="1646501876925" sinθ=-22sinθ=sin-π4θ=-π4

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