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Applications of Second Order Equations-Springs Undamped: Problem 1

(1 point)

(a) Using a trig identity, write y(t) = 4 cos (7t) - 4 sin(7t) using only one cosine function.

y(t) =

(b) Using a trig identity, write y(t) = -4 cos (7t) - 4 sin (7t) using only one cosine function.

y(t)

=

help (formulas)

help (formulas)

(c) Using a trig identity, write y(t) = 4 cos (7t) + 4 sin(7t) using only one cosine function in your answer.

y(t)

=

help (formulas)

(d) Using a trig identity, write y(t) = -4 cos (7t) + 4 sin(7t) using only one cosine function in your answer.

y(t)

help (formulas)

Fig: 1