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OpenStudy (anonymous):
If cos x = sin(20 + x)° and 0° < x < 90°, the value of x is ?
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OpenStudy (damonte212):
35°
OpenStudy (anonymous):
how did you get that?
OpenStudy (anonymous):
???
OpenStudy (damonte212):
--> 90 = 20 + 2x subtract 20 from both sides --> 70 = 2x
OpenStudy (anonymous):
oh okay thanks
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OpenStudy (damonte212):
np
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