Asked by stewie
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) 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
Answers
Answered by
Steve
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.
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.
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