Let tan(x) = 2 / 5.
What is the value of tan(π + x)?
−5 / 2
−2 / 5
5 / 2
2 / 5
Tan = sin/cos
sin and cos repeat their values at pi intervals ...with a change of sign
so tan x will equal tan (x+pi)
2/5
+24 
+37157 
