Question

simplificar Sen(90 + ).Sen(180 - ) + Cos(90 + ).Cos(180 +)

Answer 1

Respuesta:

iwheffjdoowekbfjdjdskskwjwbwbwje

Answer 2

Respuesta:

sen 2α

Explicación paso a paso:

=sen (90+α). sen(180+α+{-sen (α)}.cos (180+α)

=cos(α). sen(180-α) + {-sen (α)}.{-cos (α)}

=cos (α).sen (α) +{-sen (α)}.{-cos (α)}

=2cos (α).sen(α)

=sen (2α)