CPM Homework Help : PC3 Problem 11-155

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Home > PC3 > Chapter 11 > Lesson 11.2.5 > Problem 11-155

11-155.

Show that $\sin(4θ)=$ $4\sin(θ)\cos(θ)\cos(2θ)$ .

Step 1:

$\sin (4\theta) = \sin(2(2\theta))$

Step 2:

$= 2 \sin(2\theta) \cos(2\theta)$

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