There are four quadrants and ASTC techniques helps you remember if a trigonometric function is positive or negative in each quadrant. ADD - All (Sin, Cos, Tan) are positive SUGAR - Sin is positive ...

Trigonometric graphs can be sketched when you know the amplitude, period, phase and maximum and minimum turning points. Working with trigonometric relationships in degrees Trigonometric functions ...

When calculating the acute angle, we ignore the negative. From the graph of ... we will be in the two quadrants in which the sine function is positive, ie the first and second quadrants.