On the unit circle, where I <0<2, when is tan 0 undefined?
0=pi and 0=2pi
sin 0= cos 0
0=pi/2 and 0=3pi/2
sin 0=1/cos 0

Aportion of a line bounded by two points is defined as

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.