Prove that: Cos A/1-Sin A=secA+Tan A
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Answered by
9
Hi ,
LHS = cosA / ( 1 - sinA )
= [ cos A ( 1 + sinA ) ]/[ (1-sinA)( 1+sinA)]
= [cosA( 1 + sinA )]/[ 1² - sin² A]
= [ cosA( 1 + sinA )]/ cos²A
= ( 1 + sinA ) / cosA
= 1/ cosA + sinA / cosA
= secA + tanA
= RHS
I hope this helps you.
:)
LHS = cosA / ( 1 - sinA )
= [ cos A ( 1 + sinA ) ]/[ (1-sinA)( 1+sinA)]
= [cosA( 1 + sinA )]/[ 1² - sin² A]
= [ cosA( 1 + sinA )]/ cos²A
= ( 1 + sinA ) / cosA
= 1/ cosA + sinA / cosA
= secA + tanA
= RHS
I hope this helps you.
:)
deepthadinesh2002:
Helped me a lot.Thank you!!
Answered by
1
Answer:
LHS = cosA/(1-sinA)
= [cos A (1 + sinA ) ]/[ (1-sinA)( 1+sinA)]
= [cosA(1 + sinA )]/[ 1² - sin² A]
= [ cosA(1 + sinA )]/cos²A
= (1 + sinA ) / cosA
= 1/cosA + sinA / cosA
= secA + tanA = RHS
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