Problem

Solve the equation for exact solutions in the interval [0,360). Use an algebraic method.
6sec2θtanθ=8tanθ
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The solution set is
(Simplify your answer. Type an integer or a fraction. Use a comma to separate answers as needed. Do not include the degree symbol in your answer.)
B. The solution is the empty set.

Answer

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Answer

Final Answer: The solution set is 0,30,150,180,210,330.

Steps

Step 1 :The given equation is 6sec2θtanθ=8tanθ.

Step 2 :We can simplify this equation by dividing both sides by tanθ, assuming tanθ0. This gives us 6sec2θ=8.

Step 3 :We can further simplify this by noting that secθ=1cosθ, so the equation becomes 6(1cos2θ)=8.

Step 4 :Solving this for cosθ will give us the solutions for θ in the interval [0,360).

Step 5 :The solutions obtained are in radians. We need to convert these to degrees to match the interval given in the question.

Step 6 :We also need to consider the case when tanθ=0, which we initially assumed to be non-zero to simplify the equation. The values of θ for which tanθ=0 in the interval [0,360) are 0 and 180.

Step 7 :Combining all the solutions, we get θ = 0,30,150,180,210,330.

Step 8 :Final Answer: The solution set is 0,30,150,180,210,330.

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