Trig {base}

R Documentation

Trigonometric Functions

Description

These functions give the obvious trigonometric functions. They respectively compute the cosine, sine, tangent, arc-cosine, arc-sine, arc-tangent and arc-tangent of two arguments.

Usage

cos(x)
sin(x)
tan(x)
acos(x)
asin(x)
atan(x)
atan2(y, x)

See Also

Log, Math.

Examples

x <- 1:99/100
all(Mod(1 - (cos(x) + 1i*sin(x)) / exp(1i*x)) < 1.1 * .Machine$double.eps)
 2* abs(1 - x / acos(cos(x))) / .Machine$double.eps #-- depends ?
all(abs(1 - x / asin(sin(x))) <= .Machine$double.eps) # TRUE (Solaris)
all(abs(1 - x / atan(tan(x))) <= .Machine$double.eps) # TRUE (Solaris)

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