1. If = (cos + sin ), show that 1 + + 2 = (1 + 2 cos )(cos + sin )
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Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?