Use the form acos(bx−c)+ d a cos (b x - c) + d to find the variables used to find the amplitude, period, phase shift, and vertical shift. Find the amplitude |a| | a |. Find the period of 3cos(3x) 3 …

Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. 3x = arccos(0) 3 x = arccos (0) Simplify the right side. Tap for more steps... Divide each term in 3x …

三倍角公式是把形如sin(3x), cos(3x)等三角函数用对应单倍角三角函数表示的恒等式。应用于数学，物理，天文等学科。

\frac{d}{dx}(\frac{3x+9}{2-x}) (\sin^2(\theta))' \sin(120) \lim _{x\to 0}(x\ln (x)) \int e^x\cos (x)dx \int_{0}^{\pi}\sin(x)dx \sum_{n=0}^{\infty}\frac{3}{2^n} Show More

Cos3x is an identity in trigonometry used to find cosine function for angle 3x. The formula for cos3x is cos3x = 4cos^3x - 3cos x = 4 cos3x - 3 cos x.

The general solution for 3cos(3x)=2 is x=(0.84106…)/3+(2pin)/3 ,x=(2pi)/3-(0.84106…)/3+(2pin)/3

2024年9月30日 · 解决cosx的三次方的积分问题，需要借助三角恒等式与代数技巧。首先，我们将cosx的三次方通过半角公式转化为cos(3x)的多项式形式：cos^3(x) = (cos(3x) + 3cos(x))/4。 …

使 u = 3x。 然后使 du = 3dx，以便 1 3du = dx。 使用 u 和 d u 进行重写。 点击获取更多步骤... x3sin(3x) 3 - (- x2cos(3x) 3 + 2 3(xsin(3x) 3 - 1 3∫sin(u)1 3du)) 组合 sin(u) 和 1 3。 x3sin(3x) 3 …

2022年12月20日 · Cos3x is the cosine function of a triple angle 3x. The formula of cos 3x in terms of cos x is given by the following identity: cos3x =4cos 3 x-3cos x. To derive the cos3x …

What is the first derivative of 3cos (3x) ?