1.

Two pillars of height a and b subtend the same angle alpha at a point on the line joining their feet. If the pillars subtend angles beta and gamma at another point in the horizontal plane at which the line joining their feet subtends a right angle then,

Answer»

`(a+b) cot^(2)ALPHA = a^(2)cot^(2)BETA + b^(2)cot^(2)GAMMA`
`(a-b)cot^(2)alpha =a^(2) cot^(2)beta + b^(2) cot^(2)gamma`
`(a+b) tan^(2)alpha = a^(2)cot^(2)beta - b^(2) cot^(2)gamma`
None of these

Answer :A


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