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Mathematics 7 Online
OpenStudy (anonymous):

tanA/(1-/tanA) +(1/tanA)/1-tanA = 1+1/cosAsinA tanA/tanA(tanA-1) + 1/tanA(1-tanA) = 1+1/cosAsinA tanA/tanA(tanA-1) - 1/tanA(tanA-1) = 1+1/cosAsinA (tanA-1)/tanA(tanA-1) =1+1/cosAsinA 1/tanA=1+1/cosAsinA 1= tanA+sinA/cos^2A sinA 1=tanA + sec^2A

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