1.

ABCD is a square field with each side equal to 100 m. Two poles of equal heights stand at E, the mid point of DC and at the corner B of the field, subtending respectively angles alpha and 30^(@) at the corner A of the field. The value of alpha satisfies

Answer»

`cos 2 ALPHA = (11)/(19)`
`sin 2 alpha =(15)/(19)`
`TAN 2 alpha = (4)/(19)`
`tan 2 alpha = (19)/(15)`

ANSWER :A


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