Need help with a simple math task in C++

[Ace94]

If anyone is interested in typing the code, please PM me for more details.

 

[bambam922]

People here are verse enough with code to help you for free. Just post your problem.

 

[Ace94]

"?nter a triangle and calculate the sine of its maximal angle. The triangle is defined by the coordinates of its vertices. The coordinates are floating-point numbers."

The truth is that I am falling behind class and I can't type the code... trying to get back on track, but I don't have enough time to solve this issue by myself.

 

[bambam922]

We won't do your homework for you.
Though think back to trig.
sin(θ) = opposite / hypotenuse

So you coordinates are floating point numbers. That all well and good.
You need to define your three sides.
Coordinate1 = A
Coordinate2 = B
Coordinate3 = C

The distance between these points will be the length of that side.
Remember your distance formula is sqrt((x_2-x_1)^2+(y_2-y_1)^2)

Once you define you sides, you can find the angle by taking the inverse sin.

So θ = sin^-1(o/h)

 

[Ace94]

Thanks! I will try to do it later today. If anything pops up, can I ask for advice on PM?

 

[bambam922]

Go for it.

There is probably an easier way to do it via loops, but here is a starter.

Ex.

float pointAx = 2.6542
float pointAy = 1.9542
float pointBx = 1.2458
float pointBy = 2.6542
float pointCx = 4.2698
float pointCy = 1.2378

float sideAB = 0.0;
float sideAC = 0.0;
float sideBC = 0.0;

sideAB = sqrt((pointBx)^2-(pointAx)^2)+((pointBy)^2-(pointAy)^2))