domenica19
15.12.2021 •
Mathematics
Which of the following expressions is not
equal to the others?
A. cos 35º cos 37° - sin 35° sin 37°
B. cos 100° cos 28° + sin 100° sin 28°
C. cos 72°
D. COS 100° cos 28° - sin 100° sin 28°
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Ответ:
the anser is B
Step-by-step explanation:cos cos 35º cos 37° - sin 35° sin 37°°- COS 100° cos 28° - sin 100° sin 28°- cos 72°= cos 100° cos 28° + sin 100° sin 28°
Ответ:
A
Step-by-step explanation:
2x^2-6x+2x-6=2x(x-3)+2(x-3)=(2x+2)(x-3).