0
cos(60) = 0.5
7 x 60 x cos(60) = 7 x 30 = 210
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
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]
When does cos x equal -sin x?
The derivative of cos(x) equals -sin(x); therefore, the anti-derivative of -sin(x) equals cos(x).
Cos x equals -cos x plus 1?
No, but cos(-x) = cos(x), because the cosine function is an even function.
Why does cos x equal cos -x?
cos x equals cos -x because cos is an even function. An even function f is such that f(x) = f(-x).
Cos x - cos x sin2 x equals cos3x?
cos(x)-cos(x)sin2(x)=[cos(x)][1-sin2(x)]cos(x)-cos(x)sin2(x)=[cos(x)][cos2(x)]cos(x)-cos(x)sin2(x)=cos3(x)
If Sin equals x and Cos equals y then x squared equals what function of y?
If x = sin θ and y = cos θ then: sin² θ + cos² θ = 1 → x² + y² = 1 → x² = 1 - y²
1 over cos x equals what?
sec(x)=1/cos(x), by definition of secant.
What times 8 equals 60?
7.5 x 8 = 60
X is acute and sin x equals cos x Find cos?
x = 45 degrees sin(x) = cos(x) = 1/2 sqrt(2)
What equals 1 cos squared x divided by cos squared x?
1. Anything divided by itself always equals 1.
Sec - cos equals tansin?
Prove that tan(x)sin(x) = sec(x)-cos(x) tan(x)sin(x) = [sin(x) / cos (x)] sin(x) = sin2(x) / cos(x) = [1-cos2(x)] / cos(x) = 1/cos(x) - cos2(x)/ cos(x) = sec(x)-cos(x) Q.E.D
What is the solution to cos x equals 3 cos x - 2?
1
Cos square 90-x equals?
Cos(90 - x) = sin(x) so cos2(90 - x) = sin2(x)
