Buktikan (cot x + csc x - 1)/(cot x - csc x + 1)=(1 + cos x)/sin x
hakimium
Buktikan (cot x + csc x - 1)/(cot x - csc x + 1)=(1 + cos x)/sin x [cos x/sin x + 1/sin x - sin x/sin x] / [cos x/sin x - 1/sin x + sin x/sin x] = (1 + cos x)/sin x [(cos x - sin x + 1)/sin x] / [(cos x + sin x - 1)/sin x] = (1 + cos x)/sin x (cos x - sin x + 1)/sin x X sin x/(cos x + sin x - 1)) = (1 + cos x)/sin x (Cos x - sin x + 1)/(cos x + sin x - 1) = (1 + cos x)/sin x Sampai di sini dulu, maaf terputus, mungkin ada yang bisa lanjutkan dengan ide: kalikan bentuk 'sekawan'
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