Area of a circle = pi * r^2
A = (3.14) * 8^2
A = 3.14 * 64
A =200.96 units ^2
You would have to use the matrices option on the calculator, clearly defining your variables. (Also arrange them so that the variables are in the same exact spot in equation equations; i.e. variables on the left side in a certain order and the answer on the right side)
Begin by clicking 2nd--> matrix (its in x⁻¹)--> edit --> [A] --> specify the size to be 3×4
Write out just the coefficient of each variable, all under a single column (for the specific variable).
The answer (or the number on the right side of the equation) would be the last box on the right.
Return back to the home screen with 2nd--> quit (under mode)
Click 2nd--> Matrix--> math --> B: rref( --> 2nd --> matrix--> names--> [A] --> enter.
Click enter to see the solution.
Hope I helped :)
Answer:
Picture 1: b
Picture 2: d
Picture 3: c
Step-by-step explanation:
Hi there,
For Picture 1, to solve for an inverse function, just simply solve for x. Since the closest you can get is arccos(πx)=2y+6, you just
solve for cosine as a function: cos(2y+6)=πx and solving for x:
x= (1/π)cos(2y+6) but since variable choice is arbitrary, you can now redefine y and x:
y= (1/π)cos(2x+6)
For Picture 2, tanx is equivalent to sinx/cosx and cscx is just the reciprocal of sinx. So, it becomes:
We have already been giving the cosine value of 2, and its inverse is thus 1/2.
For Picture 3, I would recommend revisiting polar coordinates.
Polar coordinates are in the form (r, θ).
and θ . Recognize there are two possible radii, depending on what side of the circle you start from!
thanks,
The answer is C! Hoped I helped!