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From the top of a lighthouse, an observ...

From the top of a lighthouse, an observer looking at a boat makes an angle of depression of `60^(@)`. If the height of the lighthouse is `90m`, then find how far is the boat from the lighthouse.
`(sqrt(3)=1.73)`

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The correct Answer is:
`100sqrt3` m
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UNIQUE PUBLICATION-TRIGONOMETRY-PROBLEM SET
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  7. Prove that (sec theta+tan theta)(1-sin theta)=cos theta

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  11. Prove that (1)/(1-sin theta) +(1)/(1+sin theta) = 2sec^2 theta

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