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iittryluck (2)

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Olaaa!! Perrrfect answer. 0  [1 rates]

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(acos@i,asin@i) i =1,2,3 be the verices of the equl triangle inscribd in circle..then
1.cos@1+cos@2+cos@3=0
2.sec@1+............+ =0
3.tan@1+..........................=0
4.cot@1+..........................=0
whic his correct.xplain
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