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aussy123
Group Title
Write the following expression as a function of a positive acute angle.
cos 125
 one year ago
 one year ago
aussy123 Group Title
Write the following expression as a function of a positive acute angle. cos 125
 one year ago
 one year ago

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terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
@aussy123 It might help you to know that with your angle in degrees, \[\large \cos \ \theta = \sin (90^o  \theta) \]
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
So \[\large \cos(125^o)=\sin(90^o  125^o)=\sin(35^o)\]
 one year ago

aussy123 Group TitleBest ResponseYou've already chosen the best response.0
why did you use sin
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
It's an identity. It didn't say to use a specific function, it just says use a function.
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
Get it now?
 one year ago

aussy123 Group TitleBest ResponseYou've already chosen the best response.0
yes a little
 one year ago

aussy123 Group TitleBest ResponseYou've already chosen the best response.0
the answer is cos55
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
I suppose so. You're right :) It stems from the fact that it's equal to sin(35) = sin(35) = cos(90  35)
 one year ago

aussy123 Group TitleBest ResponseYou've already chosen the best response.0
I tried that way too, but I also did cos 125 = cos (180  125) =  cos 55
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
Well, as long as your methods are valid, it should be no problem.
 one year ago

aussy123 Group TitleBest ResponseYou've already chosen the best response.0
Thank you!
 one year ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
No problem :)
 one year ago
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