This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Hey lemloyvette458, good to see you again.
To express in the form , we use the compound angle formula for cosine: .
Step 1: Expand .
Step 2: Compare coefficients with . By comparing the coefficients of and :
Step 3: Find . Square both equations and add them: Since : Given :
Step 4: Find . Divide Equation 2 by Equation 1: Since , is in the first quadrant.
Step 5: Write the final expression. Substitute the values of and into :
The final answer is .
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Hey lemloyvette458, good to see you again. To express 3 x - 4 x in the form R(x + ), we use the compound angle formula for cosine: (A+B) = A B - A B.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.