Part of hypotenuse Altitude Altitude Other part of hyp. = Cos A⁰ = Tan A⁰ = A Sin A⁰ = Special Right Triangles Geometry Formula Sheet Area Formulas Shapes)…

WHAT ARE THE SIX FUNDAMENTAL TRIGONOMETRIC RATIOS? Trigonometric formulas are the six basic trigonometric ratios which establish the ratios of the lengths of the sides with each other in a right angled triangle. the three fundamental trigonometric ratios as sin, cos and tan, which their reciprocal trigonometric ratios cosec, sec and cotan are derived trigonometric ratios.

Visualization of Euler's formula (e^ix) = cos(x)+i sin(x). (Only in here because it reminds me of the low frequency tones produced by a long skipping rope, and it's a neat animation).