# 4. 4 the unit circle homework answers

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My goal for this section is the give the students a solid understanding of why we use a unit circle and the fact that the size of the circle doesn't matter when looking at trigonometric ratios. We begin by looking at the trig ratios of similar triangles on the coordinate plane. The students use the Pythagorean Theorem and what they know about trig ratios to find the sine, cosine and tangent each time. Once most students have the ratios, I ask them to analyze and make a conclusion about the three problems. I then ask for volunteers or call on someone who had particularly good insights. The goal is to get one of the students to say that they are similar triangles with the same angles and therefore the ratios are the same.

## SOLUTION: what ordered pair lies on the unit circle corresponding to 9pi/4

Unit 6 worksheet 4 using the unit circle use the unit circle above to find the exact value of the six trigonometric functions for each of the following angles. Draw in the angles for quadrant i. Unit Circle - blank and completed by solutionstomath TpT. Unit 6 worksheet 4 using the unit circle answer key. You used the length of the vertical leg of a triangle in the unit circle to find the related y value in the sine curve.

### Calculus (please help!!!)

The point P is on the unit circle. Find P x, y from the given information. Problems : Find the terminal point on the unit circle determined by each real number t. Problem 17 :. Problem 18 :.
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