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OpenStudy (anonymous):
Which of these is equal to cos 47°? A) cos 43° B) sin 43° C) tan 43° D) cos 133°
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OpenStudy (anonymous):
there is a thing called a calculator
OpenStudy (freckles):
try to use the co-function identity cos(x)=sin(90-x)
OpenStudy (anonymous):
i dont have a calculator right now..
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