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(a) Using a trig identity, write x(t) = 3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = (b) Using a trig identity, write x(t) = −3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = = help (formulas) x(t) = help (formulas) (c) Using a trig identity, write x(t) = e-4t (3 cos (7t) + 2 sin(7t)) using only one cosine function your answer. help (formulas)

(a) Using a trig identity, write x(t) = 3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = (b) Using a trig identity, write x(t) = −3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = = help (formulas) x(t) = help (formulas) (c) Using a trig identity, write x(t) = e-4t (3 cos (7t) + 2 sin(7t)) using only one cosine function your answer. help (formulas)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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(a) Using a trig identity, write x(t) = 3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = help (formulas) (b) Using a trig identity, write ä(t) = −3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = -4t (c) Using a trig identity, write x(t) = e¯4¹ (3 cos(7t) + 2 sin(7t)) using only one cosine function in your answer. x(t) = help (formulas) help (formulas)
Transcribed Image Text:(a) Using a trig identity, write x(t) = 3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = help (formulas) (b) Using a trig identity, write ä(t) = −3 cos (7t) + 2 sin(7t) using only one cosine function. x(t) = -4t (c) Using a trig identity, write x(t) = e¯4¹ (3 cos(7t) + 2 sin(7t)) using only one cosine function in your answer. x(t) = help (formulas) help (formulas)
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