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OpenStudy (anonymous):
The side of a pyramid is 50m long and forms a 30 degree angle with the ground. What is the height of the pyramid?
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jimthompson5910 (jim_thompson5910):
|dw:1421370677684:dw|
jimthompson5910 (jim_thompson5910):
|dw:1421370705407:dw|
jimthompson5910 (jim_thompson5910):
sine uses opposite and hypotenuse sin(30) = opp/hyp sin(30) = h/50 1/2 = h/50 ... use a calculator to get sin(30) = 1/2 h = ??
OpenStudy (anonymous):
I don't understand...
jimthompson5910 (jim_thompson5910):
where are you stuck?
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OpenStudy (anonymous):
when i do sin(30) its negative....
jimthompson5910 (jim_thompson5910):
you need to be in degree mode (not radian mode)
OpenStudy (anonymous):
oh duh! thanks!
jimthompson5910 (jim_thompson5910):
you're welcome
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