Cos b = 1/2[sin(a+b) + sin (a - b)]
O A. sina
B. sinb
C. cosb
D. cosa...
Mathematics, 05.05.2021 18:10 ana1810
Cos b = 1/2[sin(a+b) + sin (a - b)]
O A. sina
B. sinb
C. cosb
D. cosa
Answers: 3
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