docx, 56.72 KB
docx, 56.72 KB
Hopefully this is an accessible geometric proof of the sin(A+B) and cos(A+B) formulae
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Reviews

4.7

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Uakbayev_nurbol

2 years ago
5

wilwen29

3 years ago
5

Thanks! This is really helpful.

JillyTurner

4 years ago
5

Thank you

ksullivan6

6 years ago
5

Great proof. Makes it v easy. Thank you.

mrsmorgan1

7 years ago
5

I used this with my Further Maths class - great activity. Thank you.

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