book Maths Puzzle Numerical Ability

find the exact values for the trig functions, with the radian measure: pie/4

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book Other Question

Show EACH step in solving each of the following equations. Show which method (factoring, square root method, completing the square, or quadratic formula) you used to solve it and tell why.
a: (x + 2)^2 = 8 Write a polynomial function of least degree with integral coefficients whose zeros include 4 and 2i.