CPM Homework Help : INT3 Problem 12-77

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Home > INT3 > Chapter Ch12 > Lesson 12.2.1 > Problem 12-77

12-77.

Solve for $x$ .

$2 \operatorname { sin } ( x ) = 1$
Step (a):
Isolate $\sin(x)$ .
$\sin(x)=\frac{1}{2}$
Hint (a):
Use the unit circle to help you find the values that solve the equation.

$\operatorname { cos } ^ { 2 } ( x ) + 4 \operatorname { cos } ( x ) + 4 = 0$
Hint (b):
Let $U=\cos(x)$ to begin.
Answer (b):
No solution.

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