Solve sec(2x) − 3 = 0 for the four smallest positive solutions

Thank you!

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i