Question

I have this equation its output using a sci calc is : 0.017… but when i run it in c its output is :0.84..

The input is 1

Equation is: sin(x) – x^4 + 1

float sinp(float p1)
{
    float fop;
    float ppowers;
    printf("%f",p1);
    ppowers = pow(p1,4);
    fop = sin(p1)-ppowers+1;
    return (fop);
}

is there a reason behind this like would it be because of rad or in degree?

I havent really used the sin or any math function of C that much so I don’t really get whats wrong here. Google gave me .84 as an aswer but my calc gives me .017 which is really confusing since I need to get the same output with my calc.

Thank you all 🙂

Answer 1

I am guessing google uses degrees as angle measure in sin, while c++ uses radians and that is the reason for the difference. To convert an angle in degrees to same value in radians to the following:

rad_angle = deg_angle * (PI / 180.0);

Where PI it the good old constant you know.