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Question by Roman1224 · Apr 04, 2018 at 05:56 PM · physicsphysics2dmathequation

2D kinematics

I am trying to make a calculator and for some reason the time is not showing right. Am I doing something wrong with my equations? I get 1.73 and the online calculator gets 1.44... My angle is 45 degrees and my velocity is 10 m/s

     vx = float.Parse(velocity.text) * Mathf.Cos(float.Parse(angle.text));
     vy = float.Parse(velocity.text) * Mathf.Sin(float.Parse(angle.text));
     time = ((2 * vy) / g);
     distance = vx * time;
     print(time);

alt text

referencecalc.png (45.2 kB)
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avatar image Scribe · Apr 04, 2018 at 06:01 PM 0
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$$anonymous$$athf.Cos/Sin/Tan take an argument in radians, you can multiply by $$anonymous$$athf.Deg2Rad;

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Answer by elenzil · Apr 04, 2018 at 07:34 PM

sin() and cos() take in radians, not degrees.

so this:

 Mathf.Cos(float.Parse(angle.text))

should be this:

 Mathf.Cos(Mathf.Deg2Rad * float.Parse(angle.text))

.. and similar for Sin() as well.

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