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OpenStudy (anonymous):
Which pair of angles has congruent values for the sin x° and the cos y°? 20°; 20° 20°; 40° 20°; 50° 20°; 70°
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OpenStudy (anonymous):
I think the answer is d but i am not sure
OpenStudy (arbershabani97):
sin 40=cos 50 because when they are added, they form the 90degree so they are congruent at 20;70 , because sin 20= cos 70 and we can see cos y=70
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