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= (1 + (cosα / sinα) - 1/sinα) (1 + (sinα / cosα) + 1/cosα)
= ((sinα + cosα - 1) / sinα) ( (cosα + sinα + 1) / cosα)
= (cos²α + 2 cosα × sinα + sin²α -1) / sinα × cosα
= (sin²α - 1 + 2 cosα × sinα + sin²α - 1) / sin α × cos α
= 2 cosα × sinα / cosα × sinα
= 2
jadi jawaban yang benar adalah C