Answered: Jessica was proving the law of cosines…

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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Jessica was proving the law of cosines using the triangle below. She has drawn a line from ∠C perpendicular to side c. She labeled this line h. What is her next step?

(a) She needs to use the Pythagorean theorem to find the side lengths of both triangles that are formed.

(b) She needs to find the sine and cosine of A or B

(c) She needs to find the sine and cosine of both A and B

(d) She needs to find the area of one of the created triangles

Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).

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