If n be the number of solutions of the equation cotx=cotx+1sinx0
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a
1
b
2
c
3
d
4
answer is A.
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Detailed Solution
cotx=−cotx, cotx<0cotx, cotx≥0Case(i): Let cotx≥0. Then cotx=cotx+1sinx 1sinx=0 sinx=∞ which is impossible Case(ii): Let cotx<0. Then -cotx=cotx+1sinx ⇒cosx=-12 ⇒x=2π3,4π3 ∵0