Posted by Danika on Wednesday, April 7, 2010 at 11:44pm.
suppose beta is an angle in the second quadrant and tan beta=2. Fine the exact vaule of sin beta and cos beta

pre calc  Reiny, Wednesday, April 7, 2010 at 11:53pm
draw a rightangled triangle in the second quad
so that tan B = 3/1, that is make the opposite 3 and the adjacent 1, thus the hypotenuse is √10
so y=3, x = 1, r=√10
sinB = 3/√10, cosB = 1/√10
Answer This Question
Related Questions
 math  How would you establish this identity: (1+sec(beta))/(sec(beta))=(sin^2(...
 trig  evaluate the following in exact form, where the angeles alpha and beta ...
 Trigonometry  Prove that tan (Beta) sin (Beta) + cos (Beta) = sec (Beta) Please...
 trig  verify the identity: sec(beta)+ tan (beta)= cos(beta)/ 1sin(beta)
 trig  Given sin a = 15/17 with a in Quadrant I and cos beta = 4/5 with beta in ...
 PreCalculus  If sin(theta)=15/17 and cos(beta)=(5/13 (both theta and beta are...
 Trigonometry  Find the exact value of tan2(Beta) if sin(Beta) = 5/13 (Beta in ...
 Trigonometry  Find the exact value of tan2(Beta) if sin(Beta) = 5/13 (Beta in ...
 Math  Given that sin alpha=4/sqrt65, pi/2<alpha<pi, and cos beta=3/...
 physics  Two radar stations A and B, are separated by horizontal distance of (a...
More Related Questions