exam Maths Puzzle Numerical Ability

I have two questions. The Given: is 4.0(sin^2)(2x)=1.0 Find:X and also 16cos^2sin-4cossin-2=0 Factor and solve for sin. Please Help

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exam Other Question

x+2 over 5 > x-1 over 2 The hypotenuse of a right angled triangle is 2 cm. more than its base and 1 cm. more than twice the perpendicular. Find the sides of the triangle?