Question

The value of cos 2a/(1 - sin 2a) is
0
1
tan a
tan(45° + a)

Answer 1

Answer:

Cot( A - B)

= ( CotA cotB+1)/(cotB-cotA)

Now,

LHS = cot( 45 - A) =

= ( CotAcot45° + 1)/( cotA - cot45)

= ( CotA +1)/( cotA - 1)

= ( CosA/sinA +1)/( cosA/sinA - 1)

= (CosA+sinA)?/(cosA+sinA)(COSA-sinA)

= (cos?A+sin A+2sinAcosA)/(cos A-sin? A)

= (1 + 2sinAcosA) / cos2A

= (1 + sin2A ) /cos2A

I hope this helps you:)

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Answer 2

Q) The value of cos 2a/(1 - sin 2a) is

0

1

tan a

tan(45° + a)

ANSWER:-

refer this atterment

hope it is help you