palcochran1313
20.12.2019 •
Mathematics
Which of these pairs are equal?
a.sin 49° and sin 51°
b.sin 33° and cos 57°
c.cos 28° and sin 72°
d.cos 14° and cos 76°?
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Ответ:
C can't be since 28 + 72 = 100
Your answer is B. 57 + 33 = 90
Ответ:
Also, for arguments of functions (such as sqrt), parentheses "()" are used. Brackets "[]" are not acceptable.
That leaves only one remaining option.