Tan^2 x+sec^2 x=1 for all values of x. true or false

Which formula gives the area of a triangle? a=1/2(b+h)

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64