A clock tower stands at the crossing of two roads which points in north-southand the east west direction P, Q, R and S are points on the road due north, east, south and west respectively, where the angles of elevation of the top of the tower are respectively α, β, ϒ and δ, then 
is equal to ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 
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Understanding |
Application |
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PO = h cot α QO = h cot β PQ = h(cot α + cot β) Similarly, RS = h(cot ϒ + cot δ) |
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Hence, |
