Which trig functions are positive in the first quadrant?
- Thread starter NEHA
- Start date
ok
the absolute value of the trigonometric function of any angle is the same as that of the related angle, but the sign ( + or - ) of the trigonometric function is determined by the quadrant in which the vector lies.
ok they ask for which are positive in the first quadrant
in the book tehy ahve examples....
so i ahev to make one of my examples and show which is positive?
the absolute value of the trigonometric function of any angle is the same as that of the related angle, but the sign ( + or - ) of the trigonometric function is determined by the quadrant in which the vector lies.
ok they ask for which are positive in the first quadrant
in the book tehy ahve examples....
so i ahev to make one of my examples and show which is positive?
skeeter
Elite Member
- Joined
- Dec 15, 2005
- Messages
- 3,218
quad I ... ALL trig ratios > 0
quad II ... only sine and cosecant > 0
quad III ... only tangent and cotangent > 0
quad IV ... only cosine and secant > 0
commit to memory ... there are mnemonics to remember this, like ...
"ALL Seniors Take Civics"
quad II ... only sine and cosecant > 0
quad III ... only tangent and cotangent > 0
quad IV ... only cosine and secant > 0
commit to memory ... there are mnemonics to remember this, like ...
"ALL Seniors Take Civics"