Precalculus only right answer and you. me

Given:

We know the identity

So we can equate

when

Tan is positive in first and third quadrant

So we will get one move value for x

when

So for  

 and

Divide by 2 on both sides

 and

To get general solution we add

So option A  and option C are correct.

b.an increase in a causes b to decrease

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step-by-step explanation: