Pruebalo $sin2x=2sinxcosx$ ?

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Answer 1 · 2016-10-24T07:31:58

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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 $sin2x=2sinxcosx$

Pruebalo sin2x=2sinxcosxsin2x=2sinxcosx?