sin 91 + sin 1 / sin 91 - sin 1 =
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Given : ( sin 91° + Sin 1° ) / ( sin 91° - Sin 1° )
To Find : Simplify
Solution:
( sin 91° + Sin 1° ) / ( sin 91° - Sin 1° )
Sin C + Sin D = 2 Sin {( C + D)/2} Cos{ (C - D)/2}
Sin C - Sin D = 2 Sin {( C - D)/2} Cos {(C + D)/2}
( sin 91° + Sin 1° ) / ( sin 91° - Sin 1° )
= 2 Sin 46° Cos 45° / 2 Sin 45° Cos 46°
Cos 45° = Sin 45°
= Sin 46° / Cos 46°
= Tan 46°
( sin 91° + Sin 1° ) / ( sin 91° - Sin 1° ) = Tan 46°
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