vgl. cos x = 011
cos x = 0 ⇔ ?12
sin x = 0 ⇔ ?13
oplossing in II14
x=90°+k.360°∨x=-90°+k.180°15
cos (α − 30° ) = ½16
|sin x | = 117
√ (2.sin x) = 118
180° oplossing van ?19
2.cos x + 1 = 020
tan α = cot β21
welke FOUT ?22
welke heeft opln.?23
tan 2x = − 1 30
goniom.vgnl. 31
cos 3x = 032
cos 6x = −0,5 opl.verz.33
cos 6x = −0,5 beeldptn.34
sin²x − 1=035
tan²x = tanx36
cos²x = 2cosx37
2cos²x = sin2x38
cos 2x + cos x = 039
1 + cosx + cos2x=040
sin²x + sin²2x=041
sinx+sin3x=1+cos2x42
2cos²x+3sinx = 243
sin 2x = 2.sinx44
sin 2x = sinx45
sin 2x + cos 3x = 046
cos 3x = cos x47
2x² − 2x − cos 2α = 048
kl.p.o. sin 2x + cos 2x = 049
cos² x = 0,550
sin 2x = (cos x − sin x)²51
2sin² x + sin x − 1 = 052
tan 2x + 2.tan x = 053
sin x + sin 2x + sin 3x = 054
tan 2x = 2 ∨ tan 
= 2 55
sin 2x = cos 4x56
tan (3x − 10°).tan 40° = 157
2.cos² (3x+30°) = 158
sin x . cos x . tan x = 059
tan x < cot x 
60
cosx.cos2x = sinx.sin2x61
sinx−sin 3x + 2 = 062
gon.vgl.(sin,cos)63
tan x + 2cot x = 364
1+sinx+cosx+sin2x+cos2x=065
1+sinx+cosx+tanx=066
cos x + 
sin x = 167
1 + sin 2x = (cos 3x + sin3x) (a)68
1 + sin 2x = (cos 3x + sin3x)² (b)69
sin x + sin 2x + sin 3x =...70
sin⁴x-2sin²x.cos²x=3cos⁴x71
cos 2x + cos x = 072
cos2 x + cos2 2x + cos2 3x = 173
1 − cos 6x = tan 3x74
2 − 4.sin² x − 
= 075
2.sin x − sin²x = cos x 76
(tan²x − 1).(cot²x − 1) = −12 77
4.sin³x + 2.sin²x − 2.sinx − 1 = 078
cos 2α , cos 4α79
7cos x+3sin x = 580
3cos x+4sin x = 581
2sin x+3cos x+1 = 082
cos x + sin x = 
83
a.cos x+b.sin x = c84
cos x . cos 4x = cos 5x85
cos x . cos 2x = cos 3x 86
sinx+cosx+tanx+...=7