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how-do-you-prove-sin-a-b-sin-a-cos-b-cos-a-sin-b-geometrically-




Question Number 103887 by bemath last updated on 18/Jul/20
how do you prove sin (a+b) = sin  a cos b + cos a sin b  geometrically ?
$${how}\:{do}\:{you}\:{prove}\:\mathrm{sin}\:\left({a}+{b}\right)\:=\:\mathrm{sin} \\ $$$${a}\:\mathrm{cos}\:{b}\:+\:\mathrm{cos}\:{a}\:\mathrm{sin}\:{b} \\ $$$${geometrically}\:? \\ $$
Commented by $@y@m last updated on 18/Jul/20
https://medium.com/@nubtrek/easy-with-sin-a-b-proof-vuja-de-50c15fca3344
Commented by bemath last updated on 18/Jul/20
blank image sir
$${blank}\:{image}\:{sir} \\ $$
Commented by $@y@m last updated on 18/Jul/20
scroll up the screen and check.
$${scroll}\:{up}\:{the}\:{screen}\:{and}\:{check}. \\ $$
Answered by john santu last updated on 18/Jul/20
Commented by bemath last updated on 18/Jul/20
thank you
$${thank}\:{you} \\ $$

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