The circular motion of a particle with constant speed is

The function $x = A \sin^2 \omega t + B \cos^2 \omega t + C \sin \omega t \cos \omega t$ does not represent $SHM$ for which of the following conditions?

Which of the following equations represents a simple harmonic motion? $(\omega$ is angular frequency,$A$ is amplitude of oscillation and $i = \sqrt{-1})$

$A$ particle is executing simple harmonic motion $(SHM)$ with a time period $T = 4 \ s$. At $t = 0$,the particle is at a position where its angular position is $45^\circ$ with the $x$-axis. Find the displacement equation of the particle along the $x$-axis.

Write the force law for $SHM$ and obtain the formula for the period of an $SHM$ particle.

The periodic time of $SHM$ is also measured by $T = 2 \pi \sqrt{\frac{\text{displacement}}{\text{acceleration}}}$. Can we say that the time period depends on the displacement?