texastoast101 wrote:If sin(x)=root2/root3 and cos(x)>0, find sin (2x)
What identity do you have for sin(2x) in terms of sine and cosine? If sin(x) = sqrt/sqrt, then what is the length of the third side of the reference triangle? Then what is the value of the cosine for that triangle? What then is the value of sin(2x)?
texastoast101 wrote:If csc x=-(4/3), and x terminates in quadrant IV, find tan(x)
What is the length of the third side of the triangle? Given that x is in the fourth quadrant, what are the signs on the legs of the triangle? What then is the value of the tangent?