The number of solutions of the equation tan(x) + sec(x) = 2cos(x) and cos(x) 0 lying in the interval () is :
2
1
0
3
A.
2
Thus, Number of solution in the interval (0, 2) = 2
If birth to a male child and birth to a female child are equal-probable, then what is the probability that at least one of the three children born to a couple is male ?