1/cosec0+cot0-/sin0=1/sin0-1/cosec0 -cot0

What is the vertex form of f(x) = x2 + 6x + 3

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Could somebody me with this radical simplification?