Question

Please help me solve the given trigonometric equation.

Step 1

Consider the given equation and replace the term **cos(4****x****)** using double angle trigonometric identity. We use, **cos(4****x****) = 2cos ^{2}(2**

Step 2

We now have a quadratic equation in terms of **cos(2 x)**. Hence, we can first solve for

Step 3

Solving further...

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Trigonometry

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