10 Secret Trig Functions Your Math Teachers Never Taught You...(because they are from a pre-calculator world) A diagram with a unit circle and more trig functions than you can shake a stick at. (It's well known that you can shake a stick at a maximum of 8 trig functions.) The familiar sine, cosine, and tangent are in blue, red, and, well, tan, respectively. The versine is in green, and the exsecant is in pink. Excosecant and coversine are also in the image.

Trigonometry Study Flash Cards - This small set of 18 cards provides a quick reference of basic trigonometric information for the math student. Each card (but one) shows an angle with its degree and radian value, its location on the unit circle, the reference angle, and the sin, cos, and tan value of the angle. The mnemonic "All Students Take Calculus" is represented behind the unit circle with the letters A, S, T, and C to remind students which quadrant specific trig values are positive.

Unit Circle Trigonometry Explained - Sin Cos Tan - Radians & Degrees - M...

Pythagorean trigonometric identity - Wikipedia, the free encyclopedia

Trigonometry Study Flash Cards - This small set of 18 cards provides a quick reference of basic trigonometric information for the math student. Each card (but one) shows an angle with its degree and radian value, its location on the unit circle, the reference angle, and the sin, cos, and tan value of the angle. The mnemonic "All Students Take Calculus" is represented behind the unit circle with the letters A, S, T, and C to remind students which quadrant specific trig values are positive.

The Secondary Classroom can be fun too.....: Unit Circle Tic Tac Toe

Unit Circle Hand Trick! This is great! This blog shows you how to remember the Unit Circle with something you already have... your fingers. No more drawing out unit circles for days! This can be used to help students remember the unit circle. Pre-Cal

"I think if you look at this animation and think about it long enough, you'll understand: Why circles and right-angle triangles and angles are all related. Why sine is opposite over hypotenuse and so on. Why cosine is simply sine but offset by pi/2 radians."

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