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wu :: forums    riddles    medium (Moderators: SMQ, Icarus, Eigenray, Grimbal, ThudnBlunder, william wu, towr)    atriangle « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: atriangle  (Read 204 times) tony123 Junior Member     Posts: 61 atriangle   « on: Jun 30th, 2007, 4:04am » Quote Modify atriangle   a b c is atriangle such that tan (45 -(a/2 ) ) +tan (45 - (b/2) ) +tan (45 -( c/2) ) =1   find   cos a+cos b +cos c IP Logged Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------  - easy => medium   - hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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