Answers

2015-05-08T16:25:24+05:30
Tan  9 = 0.15838444
tan 27 = 0.50952545
tan 63 = 1.96261051
tan 81 =6.31375151
          = -2.31375152 + 6.31375151
          = 3.999999
          = 4
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