SOLUTION: prove identity using proper form (1/1-secx)+(1/1+secx)=-2cot^2x

Question 667668: prove identity using proper form
(1/1-secx)+(1/1+secx)=-2cot^2x
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
AMP Parsing Error of [(1/(1-secx))+(1/(1+secx))=-2cot^2x]: Invalid function '\x': opening bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 70. .

LCD = (1-secx)(1+secx)

AMP Parsing Error of [2/(1-sec^2x)]: Invalid function '\x)': opening bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 70. .

2/(-tan^2x)
AMP Parsing Error of [-2cot^2x]: Invalid function '\x': opening bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 70. .

hence proved

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