Question

Please help me with this questionnn

Answer 1

-(3/5) is the correct answer

Answer 2

-(3 /5)

Explanation:

Firstly expand cos

(cos x)(cos 3pi/2) + (sin x)(sin 3pi/2)

Then if tan x = 3 over 4...by drawing a triangle and using trig ratios

(* Sin x = 3/5)

Then substitute into the expansion