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secondary 3 | E Maths
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I don't know how to do does it matter if its acute? Is there a different formula for acute and obtuse?
Date Posted: 1 year ago
Views: 171
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Cos (theta) = -cos(180-theta)
Cos 150 = -cos(y)
Y=180-150
Y=30
Cos 150 = -cos(y)
Y=180-150
Y=30
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