RIYAZmaharjan RIYAZmaharjan

18-02-2021
Mathematics

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SecA (1-sinA). (Sec A+tanA)

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sophiyana sophiyana

18-02-2021

1
=— ( 1-sinA) ( 1. SinA
CosA — + —. )
CosA. CosA

=1-sinA
-————. *. 1+sinA
CosA –———–
CosA

=1-sin^2A
——————
Cos^2A

=cos^2A
——————
Cos^A

=1

Proved

Answer Link

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