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I can not seem to find a C++ function for inverse of sin, cosine and tan in the standard math library. Is there any libraries available on the web which provide such functions ?

You sure? http://www.cplusplus.com/ref/cmath/

The values are returned in radians though, so you'll have to multiply by 180/pi .

Pu-239 wrote:The values are returned in radians though, so you'll have to multiply by 180/pi .

Only if you're working in degrees, though.

If you have trouble remembering the names for the inverse trigonometric functions in C/C++, you could try to learn the classic names for those functions, which are arcsine, arccosine and so on. That way, the names "atan" and "asin" actually makes some sense, which should make them easier to remember...

The Shadow wrote:I can not seem to find a C++ function for inverse of sin, cosine and tan in the standard math library. Is there any libraries available on the web which provide such functions ?

Use cmath.

Dooey Jo wrote:If you have trouble remembering the names for the inverse trigonometric functions in C/C++, you could try to learn the classic names for those functions, which are arcsine, arccosine and so on. That way, the names "atan" and "asin" actually makes some sense, which should make them easier to remember...

Arcsine, arccosine and arctangent are still couple of months away from being taught at school. So I never realised the answer was right below my nose ! I wrote a sample program using atan and it worked exactly as I wanted. Thanks !