4. 1530 ning radian o’lchovini toping
A) 20/17п B) 20/19п C) 17п D) 9/2п
5. Cos a + sin a = 3/1 bo’lsa sin 4a+cos 4 a ni toping
A) 49/81 B) –(9/7)2 C) = 81/49 D) -149/32
9-sinf 2-variant
1. X2+6x+5<0 tengsizlikni barcha butun yechimlari yig’indisini toping?
A) 10 B) 9 C) -9 D) -10
2. Ko’paytmani darajaga ko’taring.(2a2)-6
A) 64a12/1 B) 64/a12 C) 64a12 D) -64a12
3. Amallarni bajaring. (3y-4/2x6)2
A)9y—8/4x12 B)3y-8/2x12 C)9y-4/4x6 D) 9y--8/4x-12
4. Sonlarni kamayish tartibida yozing ? a=cos 2 ; b=cos 20; c=cin 2 ; d=cin 20
A) a>c>d>b B) d>c>b>a C) c>d>b> a D)b>c>d>a
5. Sin a = 0,6 bo’lsa tg 2a toping (0
A)3,42 B) 3.,7/3 C) 24/7 D)-24/7
0>4>2>
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