The amplitude of a wave represented by displacement equation y=1√asin ωt±1√bcos ωt will be
a+bab
√a+√bab
√a±√bab
√a+bab
Assume 1√a=A cos θ (i)
1√b=A sin θ (ii)
On simplifying, we get y=A sin(ωt±θ)
Squaring and adding Eqs. (i) and (ii) A=√a+bab