buktikan identitas trigonometri cos alfa ( cse alfa - sec alfa ) = cot alfa - 1
Matematika
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Pertanyaan
buktikan identitas trigonometri cos alfa ( cse alfa - sec alfa ) = cot alfa - 1
1 Jawaban
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1. Jawaban Robinn
cotx - 1 = cosx (cscx - secx)
cotx - 1 = cosx.cscx - cosx.secx
cotx - 1 = cosx (1/sinx) - cosx(1/cosx)
cotx - 1 = cosx/sinx - 1
cotx - 1 = cotx - 1