ralvarez023 ralvarez023

12-03-2021
Mathematics

contestada

sin4u=2sin 2u cos 2u

Respuesta :

kcmabanasanchez kcmabanasanchez

14-03-2021

Answer:

If you've learnt sin(A+B) = sinAcosB + cosAsinB,

sin(4u)

= sin(2u+2u)

= sin(2u)cos(2u) + cos(2u)sin(2u)

= 2 sin(2u) cos(2u).

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