Limit question: lim x--> pi ((e^sinx)-1)/(x-pi)

Which expression shows the sum of the polynomials with like terms grouped together

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?