Question #84b26

1 Answer
Fleur
Jul 13, 2017

#sin(90°-x)=cos(90°-x)#

#cos x = sin x#

#x=45°, 135° # on the unit circle

We could also write it in radian mode: #x=pi/4, (5pi)/4#
Since there are no restrictions on the domain, however, the most correct answer would be #x=pi/4+pik#, where #k# is an integer.

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