Using sin 32 = cos (90-32), cos68= sin(90-68) 1 = + - as cosec52= sec(90-52), tan 18= cot(90-18), 1 tan 35= cot(90-35) = 1 + 1 - = { as sec = 1/ cos & cot = 1/ tan ) 13 For correct figure 2 steps 1 14 2 Mean= 5275/25= 211 1 Thus, the mean daily expenditure is Rs. 211
Using sin 32 = cos (90-32), cos68= sin(90-68) = + - as cosec52= sec(90-52), tan 18= cot(90-18), tan 35= cot(90-35) = 1 + 1 - = { as sec = 1/ cos & cot = 1/ tan ) 1 1 13 For correct figure steps 2 1 14 Mean= 5275/25= 211 Thus, the mean daily expenditure is Rs. 211 2 1
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