How to define the tangent function for all angles.
How to use dimensional analysis to convert units in chemistry problems.
Examine the United States' development as a diplomatic and military power in the world.
Trace the United States' growing diplomatic and military power into the 20th Century.
How to solve a sine equation by factoring: 4 [sin(theta)]^2 = 2.
How to derive the cosine of a difference formula.
How to write the parametric equations of a circle centered at (0,0) with radius r, oriented counter-clockwise.
How do we measure sine and cosine of pi/4?
How to evaluate expressions like tan(sin (4/5))^(-1).
How to measure the sine and cosine of 150.