exam Maths Puzzle Numerical Ability

Solve for angle θ to the nearest degree, 0 degrees <(or equal to)θ < (or equal to) 90 degrees

a) sin θ = 1/2
b) tan θ = square root 3
b) cos θ = 0.253

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exam Other Question

Solve the system of equations by graphing. Then classify the system as consistent or inconsistent; and the equations as dependent or independent.

x+y=10
x-y=-6
Will someone p If the discriminat is negative, would this be a true statement?

The discriminant is negative, so the quadratic has no real-valued zeroes and therefore no solution.