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Earn +20 ptsQ: What is 7 x 60 x cos 60 equals?
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1 over cos x equals what?
sec(x)=1/cos(x), by definition of secant.
Cos square 90-x equals?
Cos(90 - x) = sin(x) so cos2(90 - x) = sin2(x)
Solve Cos x - 1 equals 0?
cos x - 1 = 0 cos(x) = 1 x = 0 +/- k*pi radians where k = 1,2,3,...
What is Sin squared x - Cos squared x divided by 1 - Tan squared x equals cos squared x?
22
Find y'' if y equals 6x sinx?
That means you must take the derivative of the derivative. In this case, you must use the product rule. y = 6x sin x y'= 6[x (sin x)' + (x)' sin x] = 6[x cos x + sin x] y'' = 6[x (cos x)' + (x)' cos x + cos x] = 6[x (-sin x) + cos x + cos x] = 6[-x sin x + 2 cos x]
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