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If the angle between the straight lines represented by `2x^(2)+5xy+3y^(2)+7y+4=0` is `tan^(-1)m` then `[(1)/(pi m)]` is (where `[.]` denote greatest integer function)A. `0`B. `1`C. `2`D. `3` |
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Answer» Correct Answer - B If the angle ……….. `a = 2, b = 3, h = (5)/(2)` `theta = tan^(-1)((2sqrt(h^(2)-ab))/(|a+b|))= tan^(-1) ((2sqrt((25)/(4)-6))/(2+3))` `= tan^(-1)((1)/(5)) :. M = (1)/(5)` `:. [(1)/(pim)] = [(5)/(3.14)] = [1.59] = 1` |
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