Angles of the extremes of an arc

Description

Given a vector v and an angle θ, anglesArc returns the angles that A_θ v and A_{-θ} v form with the axis OX, where A_θ v represents the clockwise rotation of angle θ of the vector v.

Usage

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anglesArc(v, theta)

Arguments

v

Vector v in the plane.

theta

Angle θ (in radians).

Details

The angle that forms the vector v with the axis OX takes its value in [0,2π).

Value

angs

Numeric vector with two components.

Examples

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## Not run: 
# Let v=c(0,1) and theta=pi/4
# Consider the arc such that v is the internal angle bisector that 
# divides the angle 2*theta into two equal angles
# The angles that the arc forms with the OX axis are pi/4 and 3*pi/4
v <- c(0,1)
theta <- pi/4
anglesArc(v,theta)

## End(Not run)