This kind of questions are better solvable with limits because while doing you will get
√y² which is |y| but not simply y
absolute value functions depend on values of variables.
For solving here i considered sin(x/8) + cos(x/8) > 0
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This kind of questions are better solvable with limits because while doing you will get
√y² which is |y| but not simply y
absolute value functions depend on values of variables.
For solving here i considered sin(x/8) + cos(x/8) > 0