If sin A= 3/5 and the cos A= 4/5 what is the tan A

Me find the measure to side a and the process to solve the problem you appreciate it : )

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

Find the solution of this system of equation -7x+y=-20 9x-3y=36