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` l and m` are two parallel tangents to a circle with centre O, touching the circle at A and B respectively. Another tangent at C intersects the line `l` at D and m at E. Prove that` /_DOE=90^@.`

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    X BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-C|5 Videos

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X BOARD PREVIOUS YEAR PAPER ENGLISH-X Boards-All Questions
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