Which pair of angles has congruent values for the sin x° and the cos y°? 70°; 160° 70°; 70° 70°; 120° 70°; 20°

QUESTION POSTED AT 01/06/2020 - 04:11 PM

Answered by admin AT 01/06/2020 - 04:11 PM

For values to have congruent sin and cos value, it means that sin x=cos y
thus from the given values, the values that sin x is congruent to cos y will be found as follows;
70
sin 70=0.9397
getting the cosine for y values we get:
cos 160=-0.9397
cos 70=0.3420
cos 120=-0.5
cos 20=0.9397
from the above we see that the cosine value congruent to sin 70 is cos 20
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