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10 cards from this deck
It is ax^2 + bx + c = 0, where a, b, c are numbers.
Functions like sin(x), cos(x), and tan(x) relate angles.
A solution that does not satisfy the original equation.
Replace sin^2(x) with y^2 for simplification.
Set y = sin(x) to simplify the equation.
Cosine values range from -1 to 1.
x = (-b ± √(b²-4ac)) / 2a.
Ensure solutions are within the valid range for trig functions.
They may arise due to the periodic nature of trig functions.
Factor to tan(x)(tan(x) - 4) = 0 and solve.
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