Cos B=0.1568 round to the nearest degree

the two may have that, even a breakdown is probably offered

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

irrational, cannot

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction