Math, asked by deepthadinesh2002, 1 year ago

Prove that: Cos A/1-Sin A=secA+Tan A

Answers

Answered by mysticd
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.

:)

deepthadinesh2002: Helped me a lot.Thank you!!
mysticd: u'r welcome
mysticd: press red heart
Answered by VerifiedTick
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

Similar questions