1.

If from the top of a tower of 60 metre heigh, the angles of depression of the top and floor of a house are alpha and beta respectively and if the height of the house is (60sin(beta-alpha))/(x), then x=

Answer»

`SINALPHASINBETA`
`cosalphacosbeta`
`sinalphacosbeta`
`COSALPHASINBETA`

ANSWER :D


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