trigonometry on white paper

trigonometry background white paper sine cosine tangent cotangent secant cosecant angle right triangle hypotenuse adjacent side pythagorean theorem trigonometric ratios unit circle radian degree arc length sector area law sines cosines identities reciprocal functions inverse amplitude periodicity phase shift frequency graphs asymptote period reference sum difference double sum- -product product- -sum equations polar coordinates complex numbers euler's formula fourier series wave