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 ?

Commented by$@y@m last updated on 18/Jul/20

https://medium.com/@nubtrek/easy-with-sin-a-b-proof-vuja-de-50c15fca3344

Commented bybemath last updated on 18/Jul/20

blank image sir

Commented by$@y@m last updated on 18/Jul/20

scroll up the screen and check.

Answered by john santu last updated on 18/Jul/20

Commented bybemath last updated on 18/Jul/20

thank you