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anonymous
 5 years ago
does anybody know how to do trig?
anonymous
 5 years ago
does anybody know how to do trig?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sin3x = sin(2x+x) use sin(a+b) formula.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0what do you do with it from this point? sin2xcosx+cos2xsinx=3sinx

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sin2x = sin(x+x) and cos2x = cos (x+x)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm sorry but I'm still stuck as what I'm supposed to do with this. I put in the trig identities but after I had cancled out things and such I ended up with sinx+cosx which I'm sure is wrong

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you are supposed to get everything in terms of sin x. then you can substitute sinx = y and solve for y in a cubic equation and substitute back into sinx to find x.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so would it work if I changed sinx+cosx to sinx(1sinx)?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I am just giving you the outline of what you need to do. I haven't solved it myself.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well your insight has been most insightful, but I am hopeless a this stuff
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