Your booklet teaches you to replace cot(x) by 
So that means to replace cot²(x) by 
Try that.
AMP Parsing Error of [sin(x)+sin(x)cot^2x=csc(x)]: Invalid function '\x=csc(x)': opening bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 70.
.





Get a common denominator of sin(x):








Edwin
 

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