buktikan cot^2 x +1 +cosec^2x
Matematika
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Pertanyaan
buktikan cot^2 x +1 +cosec^2x
1 Jawaban
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1. Jawaban whongaliem
cot² x + 1 = cosec² x
(cos² x / sin² x ) + 1 = cosec² x
(cos² x / sin² x) + (sin² x / sin² x) = cosec² x
(cos² x + sin² x) / sin² x = cosec² x
1 / sin² x = cosec² x
cosec² x = cosec² x ..... terbukti