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anonymous
 one year ago
If Sin(x)+Cos(x)=5/4, What is Sin(2x) given that 0<x<pi/2
anonymous
 one year ago
If Sin(x)+Cos(x)=5/4, What is Sin(2x) given that 0<x<pi/2

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So Tan x=5/4? If so, Im confused on what to do next

dan815
 one year ago
Best ResponseYou've already chosen the best response.2sin(2x)= 2sin(x) cos(x) this is an identity

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sorry to be a bother, but how'd you get it to match the identity like that?

dan815
 one year ago
Best ResponseYou've already chosen the best response.2i multiplied both sides by 2cosx

dan815
 one year ago
Best ResponseYou've already chosen the best response.2since that would make the left side equal to sin(2x)

dan815
 one year ago
Best ResponseYou've already chosen the best response.2now u end up with nice working equations

dan815
 one year ago
Best ResponseYou've already chosen the best response.2by divide both sides by cos(x)

dan815
 one year ago
Best ResponseYou've already chosen the best response.2ugh lemme think what can we do with this now

dan815
 one year ago
Best ResponseYou've already chosen the best response.2you gotta solve these 2 system of equations somehow

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Since the problem only asks for What Sin2x equals, wouldn't 2Cos^2(x)+5/2Cos(x) be correct?

dan815
 one year ago
Best ResponseYou've already chosen the best response.2well i guess, but are u sure they arent looking for value for x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I just checked. They only want Sin2x=... Thank you so much
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