CPM Homework Help : PC Problem 6-156

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6-156.

Solve for $α$ .

$1 − \sin^{2} α = 0$
Hint (a):
1. Solve for all values since it is not domain restricted.
2. Draw a unit circle to be sure you have all values.
3. Be careful with signs!
Answer (a):
$α = \frac{\pi}{2}+2\pi n$
$α = \frac{3\pi}{2}+2\pi n$

$4 \cos^{2} α − 3 = 0$
Hint (b):
1. Solve for all values since it is not domain restricted.
2. Draw a unit circle to be sure you have all values.
3. Be careful with signs!

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