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Solving for Tangent

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if tan(x/2)=senx and cosx is not zero, find tanxa) -1 b) -(3^1/2)/3 c) 1/2 d) 1 e) 0
1. 4 answers
2. asked anonymously
3. 83 views
if 25 cos ceta = 7 where ceta belongs to ] 3 pi/2 , 2 pi [ , then tan ceta =
1. 1 answer
2. asked by mahmoud
3. 13 views