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Данякеп
@Данякеп
September 2021
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oganesbagoyan
Verified answer
Task/26548546
--------------------
29.
26sin750°
=26sin(2*360° +30°) =26sin30° =2*1/2
=1.
--------
30.
-17tg765
° = -17tg(4*180°+45°) = -17tg45° =-17*1
= -17.
--------
31.
cosx
= -√(1 -sin²x ) =
-
√
(
1 -( -0,8)²
)
=
-
√(1 -0,64 ) =
-
√0,36
= - 0,6.
* * *
180
° < x < 270° (третий четверт) , cosx <0 * * *
2 votes
Thanks 1
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Verified answer
Task/26548546--------------------
29.
26sin750° =26sin(2*360° +30°) =26sin30° =2*1/2 =1.
--------
30.
-17tg765° = -17tg(4*180°+45°) = -17tg45° =-17*1 = -17.
--------
31.
cosx = -√(1 -sin²x ) = -√(1 -( -0,8)² ) = -√(1 -0,64 ) = -√0,36 = - 0,6.
* * * 180° < x < 270° (третий четверт) , cosx <0 * * *