exam Maths Puzzle Numerical Ability

Solve:
4 sin x = csc x

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exam Other Question
In the figure below, points C, D, and F are collinear, ACF and CDE are equilateral traingles, and b +d= 90 degrees. Use a two column proof to prove that ABC is a right triangle. I need help with these problems

Solve by using the quadratic formula: 3x^2=11x+4



and also find the axis of symmetry: y=-x^2+4x+2



Thanks a million