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Grade: 11 

                        
SecA-tanA/secA pulse tanA equal to 1-2secAtanA pulse 2tans squareA
3 years ago

Answers : (1)

Nishant Vora
IIT Patna
askIITians Faculty
2467 Points 
							use the fact that sec^2 – tan^2 = 1

hence, (secA + tanA)(secA - tanA) = 1
=>(secA + tanA) = 1/(secA - tanA)
3 years ago
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