# geometry

posted by .

R =(cos0 -sin0)
(sin0 -cos0)

State the matrix R for 0=120 degrees

NB 0 represents theta

## Similar Questions

1. ### Trig

Establish the identity: 1. sin0(cot0 + tan0) = sec0 2. cos0 +1/cos0 -1 = 1 + sec0/1 - sec0
2. ### Trigonometry

use a calculator to solve on the interval 0 less than or equal to 0 < 2pi. 1. sin0 = 0.4 2. cos0 = 0.6
3. ### Trig

Solve the following interval 0<_ (less than or equal to)0(Theta)<2pi: 1. sin0(theta) + sin2 0(theta) = 0 2. 2cos^20 (theta) + cos0 (theta) -1 = 0
4. ### Algebra II

Mulitple Choice Find cos0 if sin0=3/5 and 90 degrees<0<180 degrees. A.)4/5 B.)-4/5 C.)(Sq root 34)/5 D.)(- sq root 34)/5
5. ### Algebra II

1.)P(-15/17,-8/17) is found on the unit crcle. find sin0 and cos0. 2.)solve: x=Arc tan(-sq root3). 3.)find sec0 if sin0=-4/5 and 270 degrees<0<360 degrees.
6. ### Math

1)Use the definitions sin0(theta) = y/r, cos0(theta) = x/r and/or tan0(theta) = y/x to prove that cot0(theta) = 1/tan0(theta) 2)For all 0(theta) prove: a)cos(t) = 1/sec0(theta) b. sec(t) = 1/cos0(theta)
7. ### help help helpppp--math

1)Use the definitions sin0(theta) = y/r, cos0(theta) = x/r and/or tan0(theta) = y/x to prove that cot0(theta) = 1/tan0(theta) 2)For all 0(theta) prove: a)cos(t) = 1/sec0(theta) b. sec(t) = 1/cos0(theta)
8. ### math

suppose that sin0=-5/13 and that 0 is a quadrant III angle. what is the exact value of cos0
9. ### math

Solve each equation for 0<_ 0<_ 2pi(3.14) A) 2cos^20 - sin0 -1=0 My answers: sin0= -1/2 or sin0=1 so 0 = 7pi/6, 11pi/6 and pi/2 But the back of the book says: pi/6, 5pi/6 and 3pi/2
10. ### math

verify sin0/sin0+cos0=tan0/1+tan0

More Similar Questions