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11. The value of log cotl'+ log cot2?+12. The line joining the points (3, 4) and (-2, -2) is divided by x axis in the ratio - a) 1: 1, b) 1:2, c) 2: 1, d) 3: 1. log cot 89 is - a) tan I, b) 0, c)l, d) tan89. |
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Answer» The given expression=log(cot1.cot2.cot3........cot89)=log(tan(90-1)tan(90-2)tan(90-3)........tan(90-44).cot45.cot46.cot47........cot89)=log(tan89.tan88.tan87.....tan46.cot45.cot46.cot47..........cot89)=log(cot45)=log(1)=0 |
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