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vera_ewing
 one year ago
Math question
vera_ewing
 one year ago
Math question

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vera_ewing
 one year ago
Best ResponseYou've already chosen the best response.0@Michele_Laino Is it D?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2your graph is the graph of this function: \[\Large f\left( x \right) = 2\cos x\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2now, keep in mind that: \[\Large \begin{gathered} \sin \left( {x  \frac{\pi }{2}} \right) = \sin x\cos \left( {\frac{\pi }{2}} \right)  \cos x\sin \left( {\frac{\pi }{2}} \right) = \hfill \\ \hfill \\ =  \cos x \hfill \\ \end{gathered} \]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2hint: \[ \Large  2\sin \left( {x  \frac{\pi }{2}} \right) = 2\cos x\] so, what is the right option

vera_ewing
 one year ago
Best ResponseYou've already chosen the best response.0cos x so that means it has be to be C?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2are you sure? Please follow my last hint

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2yes! That's right!

vera_ewing
 one year ago
Best ResponseYou've already chosen the best response.0Thank you, Michele!
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