If f(x) = sinx + cos ax is a periodic function then a cannot be

Let f(x) = sin a x+ cos bx be a periodic function, then

Let f(x)=sin ax+cos bx be a periodic function,then

If f(x)=sin x+cos ax is a periodic function,show that a is a rational number

If f(x)=cos x+cos ax is periodic function, then a must be (a)an integer (b) a rational number (c)an irrational number (d) an even number

If f(x)=sinx+cosa x is a periodic function, show that a is a rational number

If f(x)=sinx+cosa x is a periodic function, show that a is a rational number

If f(x)=sinx+cosa x is a periodic function, show that a is a rational number

If f(x)=sinx+cosa x is a periodic function, show that a is a rational number