Answer:
The answer is below
Step-by-step explanation:
The question is not complete, a complete question is in the form:
Use a reference angle to find the exact value of the sine, cosine, and tangent of each angle. 260°
Solution:
There are four quadrants which divides into four equal parts. If θ is the angle:
If θ falls in the first quadrant, the reference angle = θ
If θ falls in the second quadrant, the reference angle = 180 - θ
If θ falls in the third quadrant, the reference angle = θ - 180
If θ falls in the fourth quadrant, the reference angle = 360 - θ
Given 260°, this falls in the third quadrant, hence the reference angle = 260 - 180 = 80°.
In the third quadrant, sine and cosine are negative while tangent is positive. Hence:
sin(260) = -sin(80) = -0.985
cos(260) = -cos(80) = -0.174
tan(260) = tan(80) = 5.67
