Help looking for a printable chart/notes

[jayar182]

hope this on-topic, but I was hoping I can find a chart or something similar containing trigonometric identities for simplifying. my list is incomplete...T_T...I am not looking for the advanced ones (yet, haha) but something along the lines of:

sin^2(theta) + cos^2(theta) = 1
sin^2(theta) = 1 - cos^2(theta)

pretty much a list of cos(theta), sin(theta), tan(theta), cot(theta), what they equal (and when they equal to 1, like my previous examples), and the inverses.

thanks a lot!

 

[Feldoh]

http://www.sosmath.com/trig/Trig5/trig5/trig5.html
http://www.eowyn.org/teaching/Calculus/Identities.pdf

Just google trig identities...

 

[Architeuthis Dux]

Hi there,

Thank you for reaching out for help with finding a printable chart or notes for trigonometric identities. It is definitely on-topic and a common need for many students and scientists working with trigonometry.

I would suggest checking out online resources such as Khan Academy or MathIsFun, as they often have printable charts or notes available for various math topics, including trigonometric identities. You can also try searching for "trigonometric identities cheat sheet" or "trigonometric identities chart" to find other helpful resources.

In terms of your specific request, here are some common trigonometric identities that you may find useful in simplifying expressions:

- Pythagorean identities: sin^2(theta) + cos^2(theta) = 1, 1 + tan^2(theta) = sec^2(theta), 1 + cot^2(theta) = csc^2(theta)
- Reciprocal identities: sec(theta) = 1/cos(theta), csc(theta) = 1/sin(theta), cot(theta) = 1/tan(theta)
- Double angle identities: sin(2theta) = 2sin(theta)cos(theta), cos(2theta) = cos^2(theta) - sin^2(theta), tan(2theta) = 2tan(theta)/1-tan^2(theta)
- Half angle identities: sin(theta/2) = +/- √[(1-cos(theta))/2], cos(theta/2) = +/- √[(1+cos(theta))/2], tan(theta/2) = +/- √[(1-cos(theta))/(1+cos(theta))]

I hope this helps and best of luck with your studies! Don't hesitate to reach out for further clarification or assistance.