hannahmyung1113
05.11.2020 •
Mathematics
Rewrite the function using the power-reducing formulas.
f(x) = cos2 x
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Ответ:
f(x) = cos 2x = 2 cos^2 x - 1
Step-by-step explanation:
Here, we want to rewrite the given function using the power reducing formula
f(x) = cos 2x
Recall;
cos 2x = cos(x + x)
= cos x • cos x - sin x• sin x
= cos^2 x - sin^2 x
But Sin^2 x = 1 - cos^2x
Thus;
Cos^2x - sin^2 x = cos^2 x - (1 - cos^2 x)
= cos^2 x + cos^2 x - 1 = 2 cos^2 x - 1
Ответ:
Slope of path at time t = 4 is y '(4)/x '(4) = (-15cos(4) + 4cos(4) - 1 + sin(4))/(6 - 2sin(4))
When horizontal position is 60:
2 + 6t + 2cos(t) = 60
Step-by-step explanation: