cos 70 - cos 90 = (Simplify your answer.)

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter8: Complex Numbers And Polarcoordinates
Section8.3: Products And Quotients In Trigonometric Form
Problem 7PS: Multiply. Leave all answers in trigonometric form. 9(cos115+isin115)4(cos51+isin51)
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Write the expression cos 70- cos 90 as a product of two trigonometric functions.
cos 70 - cos 90 =
(Simplify your answer.)
Transcribed Image Text:Write the expression cos 70- cos 90 as a product of two trigonometric functions. cos 70 - cos 90 = (Simplify your answer.)
Sketch the graph of f. What is the amplitude and period?
f(x) = cos (4x + 5) + cos (4x - 5)
...
The amplitude of the function f(x) is approximately
(Type an integer or decimal rounded to three decimal places as needed.)
Transcribed Image Text:Sketch the graph of f. What is the amplitude and period? f(x) = cos (4x + 5) + cos (4x - 5) ... The amplitude of the function f(x) is approximately (Type an integer or decimal rounded to three decimal places as needed.)
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