Graphs of Cosine and Sine. Cosine and sine of an angle θ are defined to be the x and y-coordinates of the point P on the unit circle with the property that the line from O to P makes and angle θ with ...

Trigonometric identities are powerful tools for simplifying complex equations in math and science. Three core ...

Some of the most basic parametric curves. Here we see that circles, ellipses and Lissajous curves all arise from sine and cosine through parametrizations. Parametric Curves Applet: 10.1: This applet ...

In this animation, we see what the “polygonal sine” looks like for [the square, the hexagon, the triangle and the heart. The polygon is such that the inscribed circle has radius 1.

Next, think about the relationship between sine, cosine and the circle. Here's an illustration of the fundamental relationship between the three. Notice how the crank moves in a circle, ...

This uses the trigonometry sum of angles formula and breaks the cosine into a function of sines and cosine with angles that we know the answer for (45° and 30°). The student was really confused ...

National 5; Using the sine and cosine rules to find a side or angle in a triangle The sine rule. The sine rule can be used to find an angle from 3 sides and an angle, or a side from 3 angles and a ...

Sine, cosine and tangent all have different positive or negative values depending on what quadrant they are in. Calculating the area of a triangle using trigonometry.