exam Maths Puzzle Numerical Ability

cos^3x=cosx

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exam Other Question

Multiply:
(5√[2] + 3)(√[2] – 2√[3])
The legnths of the bases of an isosceles trapezoid are 9 and 25

A) Find the perimeter if the measure of each of the lower base angles is 30 degrees.

B) Find the perimeter if