1.

A tower subtendsanglesalpha, 2alpha, 3alphaat A,B and C all lying on the horizontalline throughthe foot of the tower the AB/BC =

Answer»

` (sin 3 ALPHA )/(sin 2 alpha) `
` 1+ 2 cos 2ALPHA `
` 2 + cos 2 alpha`
` ( sin 2 alpha )/( sin alpha ) `

Answer :B


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