# math

posted by .

could somebody tell me the answer or order of operations to this calculation.

3cos(2 x 2)

thanks.

I assume you meant

3cos(2x²)

square it
multiply it by 2
take its cosine
multiply by 3

press the = sign on your calculator after each step to overwrite any build-in order of operation

## Similar Questions

1. ### Maths

solve the equation: 4cos2*theta + 3cos*theta + 3 = 0 for values between 0 and 180 degrees If that is cosine squared in the first term, you have a quadratic equation. Normally cosine squared would be written in ASCII as cos^2 Theta.
2. ### Trig

prove the identity (sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= sinx^2 ^3 = (1-cosX^2)^3 = (1-2CosX^2 + cos^4) (1-cosX^2) then multiply that out 1-2CosX^2 + cos^4 - cosX^2 + 2cos^4 -cos^6 add that on the left to the cos^6, and …
3. ### Maths

Solve this equation fo rx in the interval 0<=x<=360 3sinxtanx=8 I would do it this way: sinxtanx = 8/3 sinx(sinx/cosx)=8/3 sin^2x/cosx = 8/3 (1-cos^2x)/cosx=8/3 cross-multiply 3 - 3cos^2x = 8cosx 3cos^2x + 8cosx - 3 = 0 (3cosx-1)(cosx+3)=0 …
4. ### Math - Trig Substitution

How can I solve the integral of x^3√(9-x^2) dx using trigonometric substitution?
5. ### Math

((4sin(atan(4/3))-4sin(0)))-(-3cos(atan(4/3))-(-3cos(0)))+((-3cos(pi/2)-(-3cos(atan(4/3))))-(4sin(pi/2)-4sin(atan(4/3))))+((-3cos(4pi/5)-(-3cos(pi/2)))-(4sin(4pi/5)-4sin(pi/2)))
6. ### Urgent math

If f(x, y, z)=sin(3x-yz), where x=e^(t-1), y=t^3, z=t-2, what's df/dt(1)?
7. ### Math

Directions: Find the Location on Unit Circle, Period & General Solution for this problem>>>>>>> sin^2x=3cos^2x What I have so far: sin^2x=3cos^2 sin^2x/cos^2=3 tan^2x=3 tanx=+and- sqrt3
8. ### math

determine the amplitude and period for each function: y=4sin x, y=2sin4x,y=-3sin2pi x, y=-3cos x, y=-3cos pi over 2 x
9. ### Math (exam tomorrow)

For the function f(x)=3cos(2x),what is the first point where it is increasing the fastest?
10. ### Calculus Question! ASAP!

Hello! I have this problem: x(dx)/sqrt(9-x^2) I was wondering why I can't use trig substitution and substitute sqrt(9-x^2) for sqrt(1-sec^2) and having: integral x = 3sin(theta) dx = 3cos(theta)d(theata) integral 3sin(theta)(3cos(theta))/3cos(theta) …

More Similar Questions