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Back to Solve trigonometric equations — Problem 1 · Task Set 76

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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Fluency Practice

1.

A tide model is H(t)=3cos⁡(πt/6)+5H(t) = 3\cos(\pi t/6) + 5, where tt is hours. Set H=7H = 7.

After isolating the cosine, what value does cos⁡(πt/6)\cos(\pi t/6) equal?

Enter as a fraction (e.g., 2/3).