phuong trinh luong giac

Phương trình lượng giác tiếp: Baì1, gpt:1, 2 2 3sin 8sin cos 4cos 0x x x x+ + = ; 4, 2 2 5sin 3 sin os x +6cos 5x xc x+ = 2, 2 2 4sin 3 3 sin 2 2cos 4x x x+ − = ; 5, 2 2 2sin 4sin osx -4cos 1 0x xc x+ − = 3, 2 2 3 cos 2sin cos 3 sin 2 0x x x x+ − − = 6, 2 2 4cos 6sin 5sin 2 4 0x x x− + − = Bµi 2:t×m m ®Ó c¸c pt sau cã nghiÖm: 1, 2 2 cos 2sin cos sinx x x x m+ − = 3, 2 2 5cos 2 3 sin cos 3sinx x x x m− + = 2, 2 2 4cos 3 sin 2 2sinx x x m− + = Bµi3:gpt:1, ( ) 3 sin cos 2sin cos 3 0x x x x+ + + = 3, ( ) 2sin cos sin cos 1 0x x x x− + + = 2, ( ) ( ) ( ) 1 2 sin cos 2sin cos 1 2 0x x x x+ + − − + = , 4; ( ) 2 sin cos sin cos 1x x x x+ − = 5, ( ) 2sin 2 2 sin cos 1 0x x x− + + = ;6; sin cos 2sin 2cos 2x x x x+ + = ;7, 1 tan 2 2 sinx x+ = 8; 2 3 sin cos 1 sin cos 3 x x x x+ = + ;9, cos sin sin cos 1 0x x x x− − + = ; 12, cos sin 1x x+ = 10, ( ) 6 cos sin sin cos 6 0x x x x− + + = ;11, 3 3 2 sin cos 2 x x+ = ; 16, ( ) 3 tan cot 1x x+ = 13, 3 3 1 sin cos 1 sin 2 2 x x x+ = − ; 14, ( ) 2 sin cos tan cotx x x x+ = + ; 15, sin cos 4sin 2 1x x x− + = Bµi 4:gpt: 1, 2 2 2 2 cos cos 2 cos 3 cos 4 2x x x x+ + + = , 2; 2 2 2 2 sin sin 2 sin 3 sin 4 2x x x x+ + + = 3, 2 2 2 2 sin 3 cos 4 sin 5 cos 6x x x x− = − ;4; 2 2 2 sin cos 2 cos 3x x x= + ;5, 2 2 2 sin 3 sin 2 sin 0x x x− − = ; 6, 6; 2 2 2 3 sin sin 2 sin 3 2 x x x+ + = ;7, 2 2 2 3 cos cos 2 cos 3 2 x x x+ + = ; 8, 2 2 2 cos cos 2 cos 3 1x x x+ + = 9; 2 2 2 2 3 cos cos 2 cos 3 cos 4 2 x x x x+ + + = ; 10, 2 2 17 sin 2 cos 8 sin 10 2 x x x π   − = +  ÷   11, ( ) 2 2 sin 4 cos 6 sin 10,5 10x x x π − = + ; 12, 2 2 5 9 cos3 sin 7 2sin 2cos 4 2 2 x x x x π   + = + −  ÷   13, 4 4 1 sin cos 4 4 x x π   + + =  ÷   ; 14, 2 2 2 2 sin sin 3 cos 2 cos 4x x x x+ = + 15, 4 4 3 sin cos 4 x x+ = ; 16, ( ) 2 2 2 2cos 2cos 2 2cos 3 3 cos4 2sin 2 1x x x x x+ + − = + 17;, 2 sin 5 sin 2sin 1x x x+ + = ; 18, sin sin 2 sin 3 cos cos 2 cos3x x x x x x + + = + + 19, sin sin 2 sin 3 0x x x+ + = ; 20, sin sin 2 sin 3 sin 4 0x x x x+ + + = 22, cos cos 2 cos3 0x x x+ + = ; 23: cos cos 2 cos3 cos4 0x x x x+ + + = 24; 4 4 sin cos cos 2x x x+ = ; 25: 6 6 7 sin cos 16 x x+ = ; 26: 6 6 2 1 sin cos sin 2 4 x x x+ = 27; 6 6 sin cos cos4x x x+ = ; 28: ( ) 6 6 16 sin cos 1 3sin 6 0x x+ − + = 28: 4 4 sin cos 1 sin 2 2 x x x+ = − ; 29; 6 6 sin cos sin 2x x x+ = ; 3o; 4 4 1 sin cos sin 2 2 x x x+ = − 31; sin sin 2 sin 3 1 cos cos 2x x x x x+ + = + + ; 32: 1 cos cos 2 cos3 0x x x+ + + = 33: sin 3 sin sin 2 0x x x − + = ; 34: ( ) ( ) 2 2sin 1 2sin 2 1 3 4cosx x x− + = − 35: ( ) cos sin sin cos cos cos2x x x x x x− = ;36: 3 3 cos sin sin cosx x x x− = − ; 37: 3 3 cos sin sin cosx x x x+ = − 38, 2 3 cos sin cos 0x x x+ + = ; 39: 3 2 cos cos 2sin 2 0x x x+ + − = ; 40: 2 3 sin sin cos 0x x x+ + =