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the height of the lighthouse is 90 metres, then fiProve :1 + sin A_ 1 + sin A +cos Acos A 1 + cos A - sin A19)20)Find the possible values of sin x if 8 sin x-cosProve :cosecx -1 _ 1V cosec x +1 sec X + tan xA kite is flying at a height of 60m oh21.to the |
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Answer» 1 + sina/ cosa × 1- sina/ 1- sina = (1+ sina)( cosa)/ ( 1 + sina)(1- sina) = ( 1+ sina)(cosa)/1- sina^2 = 1+ sina(cosa)/ cosA^2 = 1 + sina/ cosa |
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