Use the squared identities to simplify 2cos^2x cos^2x
a.) 3-4cos(2x)-cos(4x)/4
b.) 3+4cos(2x)-cos(4x)/4
c.) 3+4cos(2x)+cos(4x)/4
d.) 3-4cos(2x)+cos(4x)/4

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Is the square root of 4 plus the square root of 16 rational?

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1