What is a factor of: tan^2x + 2tan(x)cos(x) + cos^2(x) tan(x) + cos(x) tan(x) - cos(x) 2tan(x) - cos(x) both a and b

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?