Elementary equations

Elementary trigonometric equations take the form $\sin x = k$, $\cos x = k$ or $\tan x = k$: they are the basic building block to which all other trigonometric equations are reduced. Their solutions are obtained with the inverse functions (arcsine, arccosine, arctangent) and can be read geometrically on the trigonometric circle.

• Elementary trigonometric equations
• Reading on the trigonometric circle