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aussy123
 2 years ago
Write the following expression as a function of a positive acute angle.
cos 125
aussy123
 2 years ago
Write the following expression as a function of a positive acute angle. cos 125

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

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1So \[\large \cos(125^o)=\sin(90^o  125^o)=\sin(35^o)\]

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

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

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

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1Well, as long as your methods are valid, it should be no problem.
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