Solve the equation for all real values of x.
cosxtanx - 2 cos x=-1

Solution to equation for all real values of x is   .

Step-by-step explanation:

Here we have , . Let's solve :

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By quadratic formula :

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But at we have equation undefined as . Hence only solution is :

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Since ,

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Now , General Solution is given by :

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Therefore , Solution to equation for all real values of x is   .