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SecA (1+SecA)(SecA-tanA)=1  

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SecA (1+SecA)(SecA-tanA)=1

 

  • 1 answers

Shivam .G 6 years, 10 months ago

secA(1-sinA)(secA+tanA)

 

=(secA-tanA)(secA+tanA)

 

=1... using identity

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