draw a sketch of x y axis system
x = -5
y = 12
hypotenuse = 13
sin x = 12/13
cos x = -5/13
tan x = -12/5
now use 2x formulas
for example
sin 2x = 2 sin x cos x = 24/13 * -5/13
= -120/169
tanx= -12/5 x in quadrant 2
find;
sin2x=
cos2x=
tan2x=
1 answer