UDOWODNIJ TOŻSAMOŚĆ PROSZĘ O JAKIEŚ WYTŁUMACZENIE JAK TO ROBIĆ ; )
L = (1/cos²x -1)ctgx =
= [(1-cos²x)/cos²x] ctgx =
= (sin²x/cos²x) · ctgx =
= (sin²x/cos²x) · (cosx/sinx) =
= six/cosx =
= tgx
P = tgx
L = P
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L = (1/cos²x -1)ctgx =
= [(1-cos²x)/cos²x] ctgx =
= (sin²x/cos²x) · ctgx =
= (sin²x/cos²x) · (cosx/sinx) =
= six/cosx =
= tgx
P = tgx
L = P