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## Precalculus

### Course: Precalculus>Unit 2

Lesson 8: Sinusoidal models

# Interpret solutions of trigonometric equations in context

## Problem

The function R, left parenthesis, t, right parenthesis models the average number of days of precipitation in Mogadicio, Somalia on the t, start superscript, start text, t, h, end text, end superscript month of the year.
R, left parenthesis, t, right parenthesis, equals, minus, 12, cosine, left parenthesis, start fraction, pi, divided by, 6, end fraction, left parenthesis, t, minus, 2, right parenthesis, right parenthesis, plus, 13, point, 2
What does the solution set for y, equals, minus, 12, cosine, left parenthesis, start fraction, pi, divided by, 6, end fraction, left parenthesis, 7, minus, 2, right parenthesis, right parenthesis, plus, 13, point, 2 represent?