1.

If theta _(1) ,theta _(2), theta _(3),.....theta _(n) are in A.P. then (sin theta_(1) + sin theta _(2 ) +...+ sin theta _(n))/( cos theta_(1) + cos theta _(2) + ...+ cos theta _(n))

Answer»

0
`tan (THETA _(1) + theta _(n))`
`tan ((theta _(1) + theta _(n))/( 2))`
`tan ((theta_(1) - theta_(n))/(2))`

ANSWER :C


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