jika tan 1/2 A = P ,maka cos A =
Matematika
zaen16
Pertanyaan
jika tan 1/2 A = P ,maka cos A =
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1. Jawaban Anonyme
TRIgonomeTRI
tan 1/2 A = P = P/1
r = √(P² + 1)
cos A = cos² 1/2 A - sin² 1/2 A
cos A = 1/r² - P²/r²
cos A = (1 - P²)/(1 + P²)