Lessons for Topic 3.8
Graphing tangent and the reciprocal functionsThe vertical lines the tangent graph races toward at the angles where cosine is zero.Lesson
Sine, cosine and tangent as functions of a real numberOnce angles are in radians, the input to a trig function can be read as a distance along the circle.Lesson
Trig functions on the unit circleOn the unit circle the x coordinate of the terminal point is the cosine and the y coordinate is the sine.Lesson
Secant, cosecant and cotangent on the unit circleA zero coordinate makes the matching reciprocal or quotient undefined, so some angles have no value at all.Lesson