⊿ABC मध्ये, ∠C = 90° आणि AB = a, BC = b, आणि CA = c. तर (tanB - sinA + cosB) चे मूल्य शोधा:

1
\( {(cb + 2ab) \over ab}\)
2
\( {c \over b}\)
3
\( {2b \over c}\)
4
\({a \over c}\)

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