1.

Statement-I If alpha=(pi)/(18) then cos alpha+ cos 2 alpha+..... +cos18 alpha=0 Statement- II If (a+2) sin theta(2a-1) cos theta=2a+1 then tan theta=(4)/(3) Which of the above statements is correct

Answer»

Only I
Only II
Btoh I & II
Neither I nor II

Answer :B


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