Exercises: Solve Trigonometric Equations

Use radian mode on your calculator throughout. Show all steps.

Grade 9·23 problems·~30 min·Common Core Math - HS Functions·group·hsf-tf-b-7

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Warm-Up: Review What You Know

A student evaluates $\arcsin(0.6)$ on a calculator and gets $36.87$ . What is the likely error?

No error — $\arcsin(0.6) = 36.87$ in radians.

The student should have used $\arccos$ instead of $\arcsin$ .

The calculator is in degree mode. In radians, $\arcsin(0.6) \approx 0.6435$ .

$\arcsin(0.6)$ is undefined because 0.6 is not a special angle value.