krpSwsrrashton krpSwsrrashton

24-04-2017
Mathematics

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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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Beginner123 Beginner123

24-04-2017

Automatically take out a and d
C can't be since 28 + 72 = 100
Your answer is B. 57 + 33 = 90

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