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Chapter 6: Q. 65 (page 396)

Use the even鈥搊dd properties to find the exact value of each expression. Do not use a calculator.

sin(-90o)

Short Answer

Expert verified

The exact value of trigonometric expression is -1.

Step by step solution

01

Step 1. Given Information

Given that the trigonometric expression is sin(-90o).To find the exact value of trigonometric expression using even odd property.

02

Step 2. Even odd property

On applying even odd property,

sin(-胃)=-sin(胃)sin(-90o)=-sin(90o)=-sin(2脳0+1)90o鈭�sin(2n+1)90o=(-1)n=-(-1)osin(-90o)=-1

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