tan(sin−1(−1/2))=sin(sin−1(−1/2))/cos(sin−1(−1/2));
By the definition of inverse function( sin(sin−1(x))=x) :
tan(sin−1(−1/2))=−1/2∗cos(sin−1(−1/2));
By the Pythagorean identity:
cos(sin−1(−1/2))=1−sin2(sin−1(−1/2))=3/2;
tan(sin−1(−1/2))=−1/3=−3/3
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