1. Consider the equation cos x tan x 1. sin x a) Show that it is true for x = 30°. b) Show that it is true for x = 45°. c) Show that it is true for x = 60°.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 49E
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4.6 Trigonometric Identities
cos x tan x
1. Consider the equation
=1.
= 1.
sin x
a) Show that it is true for x = 30°.
b) Show that it is true for x = 45°.
c) Show that it is true for x = 60°.
d) Explain why showing that the equation
is true for x = 30°, 45°, and 60° is not a
proof that the equation is true for all
values of x.
Transcribed Image Text:4.6 Trigonometric Identities cos x tan x 1. Consider the equation =1. = 1. sin x a) Show that it is true for x = 30°. b) Show that it is true for x = 45°. c) Show that it is true for x = 60°. d) Explain why showing that the equation is true for x = 30°, 45°, and 60° is not a proof that the equation is true for all values of x.
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