Plot of the six trigonometric functions, the unit circle, and a line for the angle = radians The points labelled 1, Sec(θ), Csc(θ) represent the length of the line segment from the origin to that point Sin(θ), Tan(θ), and 1 are the heights to the line starting from the axis, while Cos(θ), 1, and Cot(θ) are lengths along the axis starting from the originFree trigonometric identities list trigonometric identities by request stepbystep This website uses cookies to ensure you get the best experience By using this website, you agree to our Cookie Policy Learn more Accept Solutions Graphing Practice;Identities expressing trig functions in terms of their supplements Sum, difference, and double angle formulas for tangent The half angle formulas The ones for sine and cosine take the positive or negative square root depending on the quadrant of the angle θ/2 For example, if θ/2 is an acute angle, then the positive root would be used Truly obscure identities These are just here for
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