Pertanyaan

Carilah nilai perbandingan trigonometri sudut α untuk perbandingan yang lain. a. cos α = 7 3

Carilah nilai perbandingan trigonometri sudut $α$ untuk perbandingan yang lain.

a. $cos α = \frac{3}{7}$

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Jawaban terverifikasi

Pembahasan

$begin mathsize 14px style sin space alpha equals depan over miring equals fraction numerator 2 square root of 10 over denominator 7 end fraction equals 2 over 7 square root of 10 end style$

$begin mathsize 14px style tan space alpha equals depan over samping equals fraction numerator 2 square root of 10 over denominator 3 end fraction equals 2 over 3 square root of 10 end style$

$begin mathsize 14px style cosec space straight alpha equals miring over depan equals fraction numerator 7 over denominator 2 square root of 10 end fraction equals fraction numerator 7 over denominator 2 square root of 10 end fraction cross times fraction numerator square root of 10 over denominator square root of 10 end fraction equals 7 over 20 square root of 10 end style$

$begin mathsize 14px style cotan space straight alpha equals samping over depan equals fraction numerator 3 over denominator 2 square root of 10 end fraction equals fraction numerator 3 over denominator 2 square root of 10 end fraction cross times fraction numerator square root of 10 over denominator square root of 10 end fraction equals 3 over 20 square root of 10 end style$