Question

we know that sin (- theta) = -sin theta
so what is sin squared (-theta) = ?
will there be minus sign or not?​

Answer 1

$we \: know \: \: \: sin( - \theta) = - sin \theta \\ \\ {sin}^{2} ( - \theta) = ( {sin( - \theta)})^{2} \\ = ( { - sin \theta})^{2} \\ = {sin}^{2} \theta$