Sine and Cosine of Complementary Angles: Record your information for steps 4 through 11. 1) Take a rectangular piece of blank paper and cut it diagonally to make a right triangle. 2) Label the angles A, B, and C (the right angle is C). 3) Label the sides lower-case a, b, and c (the hypotenuse is c). 4) Use a cm ruler to measure the lengths of a, b, and c. 5) Use a protractor to measure the angles A and B to the nearest degree. (Angle C is 90 degrees) 6) Add angles A and B. 7) What kind of angles are A and B? 8) What are the sine and cosine ratios for angles A and B? 9) What do you notice about the sine of angle A and the cosine of angle B? 10) What do you notice about the cosine of angle A and the sine of angle B? 11) Write a general statement that describes this relationship. Now express the following trigonometric ratios in terms of their cofunctions. 1) sin 40° = cos ? 2) cos 27° = 3) sin 90° = 4) cos 65° =

Sine and Cosine of Complementary Angles: Record your information for steps 4 through 11. 1) Take a rectangular piece of blank paper and cut it diagonally to make a right triangle. 2) Label the angles A, B, and C (the right angle is C). 3) Label the sides lower-case a, b, and c (the hypotenuse is c). 4) Use a cm ruler to measure the lengths of a, b, and c. 5) Use a protractor to measure the angles A and B to the nearest degree. (Angle C is 90 degrees) 6) Add angles A and B. 7) What kind of angles are A and B? 8) What are the sine and cosine ratios for angles A and B? 9) What do you notice about the sine of angle A and the cosine of angle B? 10) What do you notice about the cosine of angle A and the sine of angle B? 11) Write a general statement that describes this relationship. Now express the following trigonometric ratios in terms of their cofunctions. 1) sin 40° = cos ? 2) cos 27° = 3) sin 90° = 4) cos 65° =

Trigonometry (11th Edition)

11th Edition

ISBN:9780134217437

Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Chapter1: Trigonometric Functions

Section: Chapter Questions

Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.

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