tan1tan2tan3.......tan89=?
an {{1}^{o}} an {{2}^{o}} an {{3}^{o}} an {{4}^{o}}............ an {{89}^{o}}= a) 1 b) 0 c) infty d) ½
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UP 0 DOWN 0 0 1
an {{1}^{o}} an {{2}^{o}} an {{3}^{o}} an {{4}^{o}}............ an {{89}^{o}}= a) 1 b) 0 c) infty d) ½