The absolute value of something is also the square root of the square of that something. This can be used to solve equations involving absolute values.
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The sign function is used to represent the absolute value of a number when used in trigonometry. It is also referred to as the signum function in math.
ADDING: same sign, add and keep that sign. opposite sides, subtract their absolute values and use the sign of the number with the larger absolute value SUBRTRACTING: change the sign of the subtrahend (2nd number) then ADD using rules above.
You can use the Pythagorean identity to solve this:(sin theta) squared + (cos theta) squared = 1.
ax2 + bx + c = 0 , find the value of x . b2-4ac>o x is real (2 different values will solve) b2-4ac=o -> a double root (a single real number will solve it) x=real numbers. b2-4ac<0 x= two complex number roots (either pure imaginary or a complex number with real and imaginary components)
Eight. -4 -3 -2 -1 1 2 3 4