From 45f0eedb0313c5c7c23a50c2227feb96be44c565 Mon Sep 17 00:00:00 2001 From: zleyyij <75810274+zleyyij@users.noreply.github.com> Date: Wed, 18 Sep 2024 12:17:12 -0600 Subject: [PATCH] vault backup: 2024-09-18 12:17:12 --- education/math/MATH1060 (trig)/Identities.md | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/education/math/MATH1060 (trig)/Identities.md b/education/math/MATH1060 (trig)/Identities.md index 827001f..94c2ae6 100644 --- a/education/math/MATH1060 (trig)/Identities.md +++ b/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 $cot(-\theta) = \sqrt{3}$ +