The estimated quotient of 897 divided by 19 is what number?

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?