3. Verify the identity cos(-a) 1- sin(r) COS 1+ sin(-r) =2 sec x cos(r) Show all work and justify your steps.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 97E
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Gt no
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Recent
ZHUOHENG ZHANG
eio
= cos 0 + i sin 0.
1. Determine the equation for Euler's Theorem when 0
= T. This is called Euler's Identity. In your own words, without the use of outside resources, make a
conjuncture about why this identity is often described as the most beautiful equation.
2. Another key theorem is de Moivre's Theorem which states:
(cos 0 + i sin 0)"
= cos no + i sin n0.
Use this theorem to prove the identity, cos 30 =4 cos 0 – 3 cos 0.
Let n = 3.
This identity is of particular importance in geometry as it plays a key part in proving what angles can be constructed using a compass and straightedge.
3. Verify the identity
cos(-x)
1+ sin(-x)
=2 sec x
1- sin(x)
cos(x)
Show all work and justify your steps.
9+
7:32 PM
VR
ENG
* 4)
4/20/2022
home
end
insert
delete
prt sc
F10
F12
clet
F8
F9
F6
backspace
Transcribed Image Text:on Flowers Gt no S close i (36) Shue, Stan C (S.. A O N The Ancient Noteb.. Gt manual 5 health O blooket deturl sk genshin-chat O (9) Genshin Impact... Recent ZHUOHENG ZHANG eio = cos 0 + i sin 0. 1. Determine the equation for Euler's Theorem when 0 = T. This is called Euler's Identity. In your own words, without the use of outside resources, make a conjuncture about why this identity is often described as the most beautiful equation. 2. Another key theorem is de Moivre's Theorem which states: (cos 0 + i sin 0)" = cos no + i sin n0. Use this theorem to prove the identity, cos 30 =4 cos 0 – 3 cos 0. Let n = 3. This identity is of particular importance in geometry as it plays a key part in proving what angles can be constructed using a compass and straightedge. 3. Verify the identity cos(-x) 1+ sin(-x) =2 sec x 1- sin(x) cos(x) Show all work and justify your steps. 9+ 7:32 PM VR ENG * 4) 4/20/2022 home end insert delete prt sc F10 F12 clet F8 F9 F6 backspace
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