Pruebalo #sin2x=2sinxcosx#?

Question

9109 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-24T07:31:58

Por favor ver más abajo.

The question appears to be in Spanish and I am answering in English. I hope answer will satisfy you.

Recall formulas for trigonometric ratios of sum of angles, particularly

#sin(A+B)=sinAcosB+cosAsinB#

if #A# and #B# both are equal to #x#

this becomes

#sin(x+x)=sinxcosx+sinxcosx=2sinxcosx#

or #sin2x=2sinxcosx#