jika x + y = pi/4, tentukan tan y , tlong gan

x+y=45°
y=45°-x
tan y = tan (45-x)
tan45-tanx/1+tan45tanx
1-tanx/1+tanx

moga ngerti yaaaa

x + y = pi/4
tan(x+y) = tan(pi/4)
( tan x + tan y ) / (1 - tan(x) tan(y)) = 1
tan x + tan y = 1 - tan(x) tan(y)
tan(y) + tan(x) tan(y) = 1 - tan(x)
tan(y) ( 1 + tan(x) ) = 1 - tan(x)
tan(y)  =  ( 1 - tan(x) ) / ( 1+ tan(x) )