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education/math/MATH1060 (trig)/Identities.md

@@ -23,5 +23,10 @@ $$ cot^2 \theta + 1 = csc^2\theta $$
 # Even and Odd Identities
 - A function is even if $f(-x) = f(x)$.
 - A function is odd if $f(-x) = -f(x)$
-Cosine and secant are **even*
+- Cosine and secant are **even**
+- Sine, tangent, cosecant, and cotangent are **odd**.
 ## Examples
+> If $cot\theta = -\sqrt{3}$, what is $cot(-\theta)$? 
+
+$cot$ is an odd function, and so $cot(-\theta) = \sqrt{3}$
+