Mathematics Gr 12 Assignment QUESTION 1 1.1 Simplify without using a calculator: 2 sin (-20°).sin 520°-cos (-40°) 1.2 Prove the following identity: sin 20+ cos 20+1 2 cos 0 cos 20 cos 0-sin 0 3 NSC 1.3 Determine the general solution for: tan x = sin 2x if sin x 0 and cos x <0. 1.4 If tan 0: 1 where 0 is an acute angle, determine the valu without using a calculator and NOT solving for 0: ' Ꮎ