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OpenStudy (anonymous):
Find the exact value of sin2u under the given conditions. tan(u)=2/5 abd 180 degrees < u < 270 degrees
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OpenStudy (raden):
|dw:1366338309109:dw|
OpenStudy (raden):
first, u have to find the length of base that triangle by using pythagorean theorem
OpenStudy (anonymous):
sin2u=2sinucosu=2sinucosu/((cosu)^2+(sinu)^2)=2/(tanu+1/tanu)=20/29 u get (20,21,29)
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