sin ax+cos ax and |sin x|+|cos x| are periodic functions of same fundamental period then a is:
(a)0
(b)1
(c)2
(d)4
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1 Answers
36the question is definately easy...
clearly the period of |sinx| + |cosx| is pi/2
and, sin ax + cos ax = √2 sin(pi/4 + ax)
so, 2pi/a = pi/2 => a = 4 i guess...!!
so option (d)