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OpenStudy (anonymous):
if tan(A + B) = ntan(A-B) then sin2B/sin2A=?
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mathslover (mathslover):
What is the formula for tan(A+B) ?
OpenStudy (lgbasallote):
lol so many viewers
mathslover (mathslover):
tan (A+B) = (sinA cosB + cosA sinB) / (cosA cosB - sinA sinB)
OpenStudy (anonymous):
tanA + tanB/(1- tanAtanB)
mathslover (mathslover):
hence : |dw:1341498355014:dw|
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