Download Geometry R Unit 10 Homework #4 Name: 1. . a. sin cos 38 b. cos sin

Geometry R 1. a. sin
b. cos
c. sin
Unit 10 Homework #4 cos
38 sin
30 cos 3
Name:____________________ .
20 d. sin
10
cos 2. Melinda and Walter were both solving the same trigonometry problem. However, after they finished their
computations, Melinda said the answer was 52 sin 27° and Walter said the answer was 52 cos 63°. Could they
both be correct? Explain. 3. a.
b.
c.
d.
Make a prediction about how the sum sin30 + cos60 will relate to the sum sin60 + cos30. Use the sine and cosine values of special angles to find the sum: sin30 + cos60. Find the sum: sin60 + cos30 Was your prediction a valid predictions? Explain why or why not? 4. Langdon thinks that the sum sin30 + sin30 is equal to sin60. Do you agree with Langdon? Explain what this means about the sines of angles. 5. A square has side lengths of 7√2. Use sine or cosine to find the length of the diagonal of the square. Confirm your answer using the Pythagorean Theorem. 6. Given an equilateral triangle with the sides of length 9, find the length of the altitude. Confirm your answer using the Pythagorean Theorem. 7. 8. 9. 10. 11.
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