Simplify Tan(180+theter)*cos(90+theter)+sin(360-theter)*tan(180-theter) thanks

Answer 1

that's theta, not theter.

tan(180+θ)*cos(90+θ) + sin(360-θ)*tan(180-θ)
= (tanθ)(-sinθ) + (-sinθ)(-tanθ)
= 0

Answer 2

It's worth 5 marks how did u get =0