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A tower of height b subtends an angle alpha at a point on the same level as the food of the tower .At a second point , b meters above the first , the angle of depression of the foot pole and the finds that the elevation is now 2 theta.The value of cot thetais |
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Answer» B COT `alpha "TAN " beta ` In triangle ABD. `h=x tan alpha` In triangle BCE. `X= b cot beta` from (1) and (2) we get `thereforeh=b tan alpha cot beta` |
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