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Chapter 7: Q.6 (page 450)

Find:

sin(-π6)=_____;cosπ=______

Short Answer

Expert verified

sin(-π6)=-12cosπ=-1

Step by step solution

01

Step 1. Given Information:

Given expression:

sin(-π6)=_____;cosπ=_____

We have to find the values of expression.

02

Step 2. Solution:

The sine function is an odd function which means that sin(-x)=-sin(x).

Therefore, using the unit circle, we get:

sin(-π6)=-sinπ6=-12

Hence sin(-π6)=-12

Using unit circle, we get:

cos(π)=-1

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