- #1
en bloc
- 19
- 0
Homework Statement
http://images.calcchat.com/solutionart/etf5e/03/d/se03d01063.png
Homework Equations
The Attempt at a Solution
I get to the third row, but can't simplify (Sin2θ)(Cos2θ). I'm looking at the trigonometric double angle formulas, and still can't figure out how the final answer came to be 1/2(Sin4θ)
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