Question

Prove that (sin 7A+sin 17A / cos 7A+cos 17A ) = Tan12A​

Answer 1

$\bold{ANSWER≈}$

Numerator = sin 71-sin 58 = 2 sin (70-56) Acous (70+58)

2 = 2 ing 6 cast

Renomenaloz cas 78 + cas58 二 2 cas (78+58). cas (70-50)

2

= 2 cos 60-Cos 0

=> N

D

2sin-bros 0 sint

cost

Hence proved