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Clay Hamilton
Mathematics
3 October, 19:20
Connections between tan theta and tan (90 + theta)
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Damon Harper
3 October, 19:32
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Tan (90 + theta) = (tan90 + tantheta) / (1-tan90tantheta)
= (sin90costheta + sintheta cos 90) / (cos90costheta - sin90sintheta))
= sin (90 + theta) / cos (90 + theta) = costheta/-sintheta = - 1/tantheta
tan (90 + theta) = - 1/tantheta
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