if tanx=2 is given, find sin2x+cos2x

[pallid pagoda]

is equation 3 correct?

shouldnt it be tan2x = 2tanx/1-tan^2x

[snow vine]

draw a triangle using edges which satisfy tanx = 2

solve for remaining edge

use equations 4 and 5

let us know if this gets you the answer. if not, show work and explain confusion @rough terrace

[pallid pagoda]

would you be allowed to draw a triangle though if you can only use those formulas?

[snow vine]

of course

if you cant draw the triangle just do it in your head lmao