tgx=-2.4
sinx/cosx=-2.4
sinx=-2.4/y
cosx=1/y
y^2 = 2.4^2 + 1^2
y^2 = 2.6^2
y = 2.6
sinx=2.4/2.6=-12/13
cosx=1/2.6=5/13
tgx=-2.4
sinx/cosx=-2.4
sinx=-2.4/y
cosx=1/y
y^2 = 2.4^2 + 1^2
y^2 = 2.6^2
y = 2.6
sinx=2.4/2.6=-12/13
cosx=1/2.6=5/13