reciprocal in cmath

[Blessman11]

what is the reciprocal in the cmath library.

isn't (1.0/(tan (59.0))* 1.0/7.0)
the same as 1 / (RECIPROCAL(tan 59)) * 1 / 7

however I get different answers when I use the calculator and then write the program. please can someone tell me why c++ is not following my calculator

[Zhuge]

Doesn't look the same to me. In the second part, you have added RECIPROCAL() around the tangent, which would make the result different from the previous code which doesn't have that.

[rocketboy9000]

tan(59.0)/7.0 //try this
The reciprocal of x is 1/x.
therefore
1/reciprocal(tan(59)) *1/7
= 1/(1/tan(59))/7
= 1*(tan(59)/1)/7
= tan(59)/7
Use your middle-school algebra skills before writing code.

[D80DSL3A]

Another possibility... 59.0 looks like an angle in degrees. The cmath function uses radians. Are you using angle in degrees on your calculator?