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Is anyone available for a pre-calc question? Thanks in advance for your help

Is anyone available for a pre-calc question? Thanks in advance for your help-example-1
User Mohd Nashirudden
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1 Answer

24 votes
24 votes

STEP - BY - STEP EXPLANATION

What to find?

The equivalent expression.

Given:


cos2x-sinx

Step 1

Simplify cos2x


\begin{gathered} cos2x=cos(x+x)=cosxcosx-sinxsinx \\ \\ =cos^2x-sin^2x \end{gathered}

Step 2

Replace the above in the given expression.


cos^2x-sin^2x-sinx

ANSWER


cos^2x-sin^2x-sinx

User Tokenvolt
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