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Chapter 6: Q 34. (page 381)

Find the exact value of each expression. Do not use a calculator.

cos180掳-sin180掳

Short Answer

Expert verified

The exact value ofcos180掳+sin180掳=-1

Step by step solution

01

Step 1. Given information

cos180掳-sin180掳

02

Step 2. Solution

cos180掳=cos(180掳-0掳)=-cos0掳=-1sin180掳=sin(180掳+0掳)=-sin0掳=0Puttingthevaluesinthegivenexpressionweget,-1-0=-1So,cos180掳+sin180掳=-1

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