( . ۻ)
___ 1 ___
__________________________________
__________________________________
..
, 2015 .
I.
y
1) ___________________ , __________________.
2) :
, α _____________________________________;
, α __________________________________.
3) 10 ,
, 1/360 .
1/60 ____________________________________. __________________________________________.
4) 1 . 1 , , _______________________________________________.
5) , , 3600, ________ .
6) π , _________.
7) 1800 = π : ) 3600 = 2 π; ) 900 = ______; ) ________= π/3; ) 300 = π/6; ) ______ = π/4 ..
II. , , , .
1) , .. ______________________ , ______. (___;____). α (1; 0) α. .
1. α __________________ , (1; 0) α.
2. α __________________ , (1; 0) α..
3. α _______________ α ______________. .., tg α = sin α / cos α
4. α α ______________. .., tg α = ____________________
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III.
1) α I , , sin α > 0, cos α ____ 0, tg α ____0, tg α ____ 0
2) α II , , , sin α ______0, cos α < 0, tg α ____0, tg α ____ 0
3) α III , , sin α < 0, cos α ____ 0, tg α ____0, tg α ____ 0
4) α IV , , , sin α > 0, cos α ____ 0, tg α ____0, tg α ____ 0
IV.
1) :
sin2 α + cos2 α = 1
2) :
sin2 α = 1 - cos2 α; sinα = √1 - cos2 α
cos2 α = ______________; cos α = √_________
3) tg α = ___________________,
ctg α = cos α /sin α.. , tg α·ctg α = ____________
4) sin (-α) = - sin α; cos (- α) = ________________________;
tg (- α) = ___________; ctg (- α) = _____________________.
5) , sin α = 0,5 π/2 < α < π.
cos α, tg α, tg α.
. 1. .. π/2 < α < π, α ____________, _______________, ____________________.
cos α = - √ 1 - sin2 α
cos α = _________________________________________________
2. tg α = sin α / cos α tg α = ________________
V.
1) , π/2 α, 3π/2 α, π α, 2π α I .
:
1. π α, 2π α (.. ) ______________________________.
2. π/2 α, 3/2 π α (.. ) ______________________________( , __________________________ ____________________, _____________________
3. , , , α I .
, cos (π/2 + α) = - sin α - , .. π/2 + α , , .. π/2 + α II , .
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2) :
π + α | π - α | 2π + α | 2π - α | π/2 + α | π/2 - α | 3π/2+α | 3π/2- α | |
sin | ||||||||
cos x | ||||||||
tg x | ||||||||
ctg x |
3) :
) cos 3000
3000 2700 + 300 :
cos 3000 = cos (2700 + 300) = sin 300 ( , .. 3000 , +, .. 3000 IV , )
) sin (- 1200) = ____________________________________________________
) tg (1350) = ______________________________________________________
) cos 8π/3 = _______________________________________________________
2π.
cos 8π/3 = cos (2π + 2π/3).
:
cos 8π/3 = cos (2π + 2π/3) = cos 2π/3.
2π/3 π π/3, :
cos 8π/3 = cos (2π + 2π/3) = cos 2π/3 = cos (π π/3) = - cos π/3 = - 1/2
) sin 25 π/6 = ______________________________________________________
______
VI.