kTatyaj3pentuli kTatyaj3pentuli

11-11-2016
Mathematics

contestada

Which of these is equal to cos 47Á? A) cos 43Á B) sin 43Á C) tan 43Á D) cos 133Á

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pandamanog pandamanog

17-11-2016

I believe the answer is B.

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alsteva alsteva

18-11-2016

Correct answer is B.

[tex]\alpha+\beta=90^o \\ \cos{\alpha}=\sin{(90^o-\alpha)} \\ \cos{47^o}=\sin{(90^o-47^o)}=\sin{43^o}[/tex]

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