Question

Refer to the photo given above for the question. Thank you!​

Answer 1

Step-by-step explanation:

Cos A = sec therefore Rs 1 equals to a + 1 minus A minus 1 then Cos A = 2 a - 1 by a + 1 is needed in that

Answer 2

Step-by-step explanation:

$\sec( \alpha ) - \tan( \alpha ) = a + 1 \div a - 1$

$\binom{1}{ \cos( \alpha ) } - \binom{ \sin( \alpha ) }{ \cos( \alpha ) } = \binom{a + 1}{a - 1}$

$\binom{1 - \sin( \alpha ) }{ \cos( \alpha ) } = \binom{a + 1}{a - 1}$

$\binom{ \cos( \alpha ) }{1 - \sin( \alpha ) } = \binom{a - 1}{a + 1}$

$\cos( \alpha) = \binom{a - 1}{a + 1} ) \times (1 - sin \alpha )$