Angle Measurements
Convert 60∘ to radians
П/3
What is sine?
The ratio of the opposite side to the hypotenuse in a right triangle.
If cos(a)=3/5 in the 1st quadrant. Find tan(a).
4/3
Simplify: sin(90∘ -x)
cos(x)
Convert -7П/6 to degrees.
-210∘
What is tangent?
The ratio of sine to cosine.
If cot(a)=5/12 in the 3rd quadrant. Find sin(a).
-12/13
Simplify: tan(990+x)
-cot(x)
A full revolution in radians.
2П
The function(s) that has (have) a period of П.
tangent and cotangent
If sin(a)=4/5 and cos(b)=12/13. Find cos(a-b).
56/65
Reduce the value of sin(1120∘ ).
sin(40∘ )
In which quadrant(s) is cos(x) negative?
II and III
The function that is undefined at 180∘ and 360∘.
cot(x)
If tan(a)=1. Find tan(2a).
Undefined.
Use a reduction formula to find cot(1170∘ )
cot(1080∘ +90∘ ) = 0