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OpenStudy (anonymous):
Which pair of angles has congruent values for the sin x° and the cos y°? a. 70°; 160° b. 70°; 70 c. 70°; 120° d. 70°; 20°
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Directrix (directrix):
The sine of an acute angle and the cosine of the complement of that angle are the same - that's one of the cofunction identities. @lowcard2
Directrix (directrix):
Do you see a pair of complementary angles among the options?
OpenStudy (anonymous):
d?
Directrix (directrix):
That is what I got.
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