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A window of a house is h metres above th...

A window of a house is h metres above the ground. From the window, the angles of elevation and depression of the top and bottom of another house situated on the opposite side of the lane are found to be `alpha and beta` respectively. Prove that the height of the house is `h(1 + tan alpha cdot tan beta)` metres.

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CBSE COMPLEMENTARY MATERIAL-SOME APPLICATIONS OF TRIGONOMETRY-LONG ANSWER TYPE QUESTIONS
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