 Hi and welcome to our session. Let us discuss the following question. The question says evaluate limit x approaches by sin 3x minus 3 sin x by pi minus x whole cube. Let's now begin with the solution. In this question we have to evaluate limit of sin 3x minus 3 sin x upon pi minus x whole cube as x approaches pi. We know that sin 3x is equal to 3 sin x minus 4 sin cube x. So by substituting this in place of sin 3x we get limit of 3 sin x minus 4 sin cube x minus 3 sin x divided by is equal to minus 4 into limit into 1. This is equal to minus 4 and so requires a...