- #1
Neopets
- 29
- 0
Homework Statement
Tanθ = 5/12 , with θ in Quadrant 1, find sin2θ?
Homework Equations
The Attempt at a Solution
I drew a diagram in quadrant 1, it pretty much looked like a right triangle with a 5 for the length of the sin part and the 12 for the length of the cos part of the tan of 5/12 mentioned in the initial question. Then I noted that sin will be positive in the first quadrant. Now I'm having trouble coming up with the formula to use, I tried Sin2θ=2sinθcosθ which did not work.