Programming in C

Math Functions 489

double complex catan (z)

Returns the complex arc tangent of z.

double complex catanh (z)

Returns the complex arc hyperbolic tangent of z.

double complex ccos (z)

Returns the complex cosine of z.

double complex ccosh (z)

Returns the complex hyperbolic cosine of z.

double complex cexp (z)

Returns the complex natural exponential of z.

double cimag (z)

Returns the imaginary part of z.

double complex clog (z)

Returns the complex natural logarithm of z.

double complex conj (z)

Returns the complex conjugate of z(inverts the sign of its imaginary part).

double complex cpow (y, z)

Returns the complex power function yz.

double complex cproj (z)

Returns the projection of zonto the Riemann sphere.

double complex creal (z)

Returns the real part of z.

double complex csin (z)

Returns the complex sine of z.

double complex csinh (z)

Returns the complex hyperbolic sine of z.

double complex csqrt (z)

Returns the complex square root of z.

21 0672326663 AppB 6/10/04 2:03 PM Page 489