I need to to know the formula for computation of sine, cosine and tangent without the use of a calculator. Thanks guys.

If you are using Java, you should use the MATH API in Java. I did a similar thing in one of my android app.

To convert a value to sine or cosine, I used these functions

  double valueOfSin = Math.sin(trigInput);
double valueOfCos = Math.cos(trigInput);
double valueOfTan = Math.tan(trigInput);
double valueOfArcsin = Math.asin(trigInput);
double valueOfArccos = Math.acos(trigInput);
double valueOfArctan = Math.atan(trigInput);

To convert to angle in degree, I used this method

double angleA = Math.toDegrees(Math.asin(trigInput));

You can also convert to radian with Math.toRadian(param)


Let me know if you have more questions

nollyj: If you are using Java, you should use the MATH API in Java. I did a similar thing in one of my android app.

To convert a value to sine or cosine, I used these functions

  double valueOfSin = Math.sin(trigInput);
double valueOfCos = Math.cos(trigInput);
double valueOfTan = Math.tan(trigInput);
double valueOfArcsin = Math.asin(trigInput);
double valueOfArccos = Math.acos(trigInput);
double valueOfArctan = Math.atan(trigInput);

To convert to angle in degree, I used this method

double angleA = Math.toDegrees(Math.asin(trigInput));

You can also convert to radian with Math.toRadian(param)


Let me know if you have more questions

http://en.wikipedia.org/wiki/CORDIC

http://www.homeschoolmath.net/teaching/sine_calculator.php (Sine - Taylor's which can also be used to compute Cosine and of course Tangent)

I got that from Google.

I do php. But i was curious about the formula from a mathematical angle and not from a code end this time.

logica: http://en.wikipedia.org/wiki/CORDIC

http://www.homeschoolmath.net/teaching/sine_calculator.php (Sine - Taylor's which can also be used to compute Cosine and of course Tangent)

I got that from Google.

I'll visit the link. Tnx.

You can use Power series but it might not be accurate.
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