Mathematics · essential
Basic trigonometric functions and domains for JEE
Polynomial, rational, trigonometric, logarithmic and exponential functions
Formula
\[\sin x,\cos x\text{ defined }\forall x;\quad \tan x=\frac{\sin x}{\cos x},\ \sec x=\frac1{\cos x},\ \csc x=\frac1{\sin x},\ \cot x=\frac{\cos x}{\sin x}\]
Variables: \(x\) in radians for calculus formulas.
Conditions: \(\tan x,\sec x\) undefined when \(\cos x=0\); \(\csc x,\cot x\) undefined when \(\sin x=0\).
Limits, continuity, derivatives and graph questions.