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anonymous
 one year ago
Medal and fan for those who can help me with precalc :)
anonymous
 one year ago
Medal and fan for those who can help me with precalc :)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@mathmate its a tough problem mate :/ could you please help

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0Hint: Use FOIL to get the products then use trigo identities to simplify: cos(a+b)=cos(a)cos(b)sin(a)sin(b) sin(a+b)=sin(a)cos(b)+cos(a)sin(b)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you multiply 3*7 by any chance?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Im leaning towards A

mathmate
 one year ago
Best ResponseYou've already chosen the best response.07 and 3 are multiplied similar to 3(x+1) * 7(x1) = 21(x^21)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0never mind i got it its c

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I was doing it wrong

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0c'est vrai @mathmate ?
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