BÀI TP PHNG TRÌNH LNG GIÁC NÂNG CAO LP 11ẬƯƠƯỢỚBài 1. Gi i các ph ng trình ảươ()02sin x 30 2− =2sin 2x cos x3 3π π + = − ()tan 3x .cot 5x 1 02π + + = ()0sin x 45 cos2x− =()0tan 2x 15 1 0− − =2sin 2x cos x3π = − sin 2x cos2x3π + = tan 2x cot3x 0+ =3 tan 2x 33π + = − 2x2 2 sin 23+ π = 2 3cos 3x 3 03π + − = 33cot x 3 02π − + = 6tan 3x .cot 2x 05 4π π − + = ()tan 3x . cos2x 1 02π + − = cos 3x 1 .sin x 02 5 π π + + + = 6cos 4x 3 3 05π + + = 1cos x3 2π − = 2sin 3x cos x 04 3π π + − + = Bài 2. Gi i các ph ng trình (D ng: atảươạ2 + bt + c = 0)22sin x 3sinx 5 0+ − =26cos x cosx 1 0− − =22cos 2x cos2x 0+ =2cot 2x 3cot 2x 2 0+ + =()2tan x 3 1 tan x 3 0+ − − =26cos x 5sinx 7 0+ − =tan x cotx 2+ =xcosx 3cos 2 02+