Y11-12 Mathematics: Compound and Double Angles

In this HSC Maths Extension 1 video, we go through how to deal with trigonometry expressions that are made up of two angles. This can help with simplification and will later help in integrating expressions we previously couldn't.

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[gayathrisajeev]

Omg thank you so much I have struggling with this especially given that classes are online. It's a little confusing but your explanation gave me a better idea than what I had before. Thank you so so so so so much 💞

[Omar-ivop]

man you help me so much thank you so much, i was really struggling with this, you explained it better than my teacher.

[ProEpicGuyac]

4:04 no ... i also get those kind of thoughts buddy, you ain't alone XD

[mannydb]

Thank you so much. I can confidently say that I understand Trig expressions and Identities. The explanation was clear and thorough.

[reazpersaud]

for the fact that i really like this video, but somehow as a person now introduced to this topic at university. I'd really appreciate if u can slow it down in future videos

[vyshnavikonda]

this video helps me a lot thanks for posting

[lwh]

Why not just use a calculator to figure out what COS (75) is?