4
QuizMultiple Choice
Solving Trigonometric Equations — Unit test
Question 4 • Precalculus
To solve the trigonometric inequality over the interval radians, Gabby performed the following steps, first simplifying the inequality and then setting both sides equal to y and graphing the equations. Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: In which step did she first make an error, and what was the error?
Answer
A
She first made an error in step 3 because she should not have subtracted and added to the right side of the inequality.
B
She first made an error in step 4 because the simplified form of the inequality should have been instead of .
C
She first made an error in step 5 because she did not correctly graph .
D
She first made an error in step 6 because she chose the wrong interval in which the graph of one equation is at or above the graph of the other equation.