Answers

2014-06-02T11:57:09+05:30
Sin(Ф)=opposite side/hypotenuse                  cos(Ф)= adjacent side/hypotenuse
        =+y/l                                                           =+x/l
sin(-Ф)=-y/l                                                  cos(-Ф)=+x/l

x,y,l⇒ are angles
Ф ⇒ is angle
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