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WorksheetsҮй тапсырмасын тексеру, №28.5
Total questions: 4
Worksheet time: 2mins
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Worksheets1) sin α sin β = - 21 ; cos α cos β = −21 болса, онда, cos (α+β) өрнегінің мәнін табыңыз:
-1
1
0
1/2
2). sin α sin β = 21; cos α cos β = 21 болса, онда ; cos( α−β ) өрнегінің мәнін тап
1/2
-1
1
0
3) cos α cos β = −21 ; sin α sin β = −21 болса, онда 2 cos (α−β) өрнегінің мәнін табыңыз.
- 3
2
2
0
4) cos α cos β = −21 ; sin α sin β = −21 болса, онда 3cos ( α+β ) өрнегінің мәнін табыңыз:
-2
-1
0
3
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