sin = y/r
cos = x/r
tan = y/x
r is always positive
In QIV, x is positive and y is negative
In QII, x is negative and y is positive
So,
in QII, cos,tan,cot,sec are negative
in QIV, sin,tan,cot,csc are negative
only tan,cot are negative in both.
identify all of the basic trig functions that fit each description.
1) is negative for angles in the 2nd and 4th quadrant
2) is unbounded
answer: tan, cot
3) has a range of -1 ≤ y ≤ 1
answer: sin, cos
are my answers correct? and i'm not sure what the answer to number 1 is
1 answer
0 answers