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if cos(angle)=-sin (angle) then what is sin^2(angle) ?
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High School Teacher
`cos(angle) = -sin(angle)` when `angle = (3pi)/4` and `(7pi)/4`
`sin(angle) = +-1/2`
so `sin^2(angle) = 1/4`
Posted by beckden on May 6, 2012 at 6:07 AM (Answer #1)
Honors, Dean's List
let angle be A
now cosA=-sin A
squaring both sides,
Therefore, in the given condition, sin ^2 (angle) =1/2
Posted by ayush01 on August 9, 2012 at 9:39 AM (Answer #2)
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