sinA tanA/1-cosA=1+secA
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L.H.S. sin.tanA/1-cosA
sins.tanA/1-cosA×1+cosa/1+cosa
(sinA.tanA)(1+cosa)/sin squares
sins.tanA+sinA.tanA+sinA .tanA.cosa/sin square A
1+1/cosA
1+ secA. proved
sins.tanA/1-cosA×1+cosa/1+cosa
(sinA.tanA)(1+cosa)/sin squares
sins.tanA+sinA.tanA+sinA .tanA.cosa/sin square A
1+1/cosA
1+ secA. proved
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