# Pre Calc

How do you find cot(225degrees) using the unit circle?

1. 👍
2. 👎
3. 👁
1. Draw the unit circle, and draw the line making an angle of 225° with the +x axis.

That line intersects the circle at (-1,-1)

cos225° = x/y = -1/1 = 1

1. 👍
2. 👎
2. Thank you :)

1. 👍
2. 👎

## Similar Questions

m

2. ### trigonometric function

If sinA=12/13 & tan B=3/4 then find ¡= sin(A+B) ¡¡=COS(A-B) ¡¡¡=COT(A-B) ¡v=cot(A-B) Sir please give me the correct ans because tomorrow is my class

3. ### Math

Find the circumference of the circle. Use 3.14 for π. Round to the nearest unit. (Show picture of circle with a diameter, with 21cm at one side) A) 24cm B) 66CM C) 125cm D) 69cm Please help me understand, that means don't tell me

4. ### Math

Factorthen use fundamental identities to simplify the expression below and determine which of the following is not equivalent cot^2 a * tan^2 a + cot^2 a A. csc^ 2 alpha B.1/ sin^ 2 alpha C.1/ 1-cos^ 2 alpha D.sec^ 2 alpha

1. ### Math

Find the circumference of the circle. Use 3.14 for pi. Round to the nearest unit The circle only has the diameter which is 17cm Please do step by step so I understand it A)53cm B)227cm C)20cm D)27cm I think its B but I don't know.

2. ### Math

Find the missing coordinate of p, using the fact that p lies on the unit circle in the given quadrant. P( ), -3/7

3. ### Trig identities

Sin x/[1-cos(-x)] = csc x + cot x Please Verify the Identity. I have been going in circle with this one... Just a hint would be nice. Thank you.

4. ### Math

Hi! Okay so I started to attempt this math problem; 3cot^2x-1=0. However, I'm a little stuck. My teacher wants me to find the Location on The Unit Circle, Period, and General Solution. Can someone check what I have and help me

1. ### Geometry

Please Someone Help!!! Find the coordinates of a point on the unit circle corresponding to a 36 degree angle rotation. Find the coordinates of a point on the unit circle corresponding to a 115 degree angle of rotation. Find all

2. ### probability

Suppose that X and Y are described by a joint PDF which is uniform inside the unit circle, that is, the set of points that satisfy x2+y2≤1 . In particular, the joint PDF takes the value of 1/π on the unit circle. Let

3. ### math

Let the equation of a circle be x^2+y^2-14x+8y+56 a. Find the standard form of the circle b. Find the center of the circle c. Find the radius of the circle

4. ### geometry

The endpoints of the diameter of a circle are at (1,2) and (7,-6). What is the circumference of the circle, to the nearest tenth of a unit.