tolong bantu nomor 2 dan 7 saja dong, terimakasih.
Matematika
Rktnn
Pertanyaan
tolong bantu nomor 2 dan 7 saja dong, terimakasih.
1 Jawaban
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1. Jawaban hendrisyafa
2) [tex]y= \frac{2x+6}{3x} [/tex]
3xy = 2x+6
3xy-2x = 6
x(3y-2) = 6
[tex]x= \frac{6}{3y-2} [/tex]
[tex]f^{-1}(x)= \frac{6}{3x-2} [/tex]
7) Cos A = 4/5, tg A = 3/4
Sin B = 5/13, tg B = 5/12
sin A cos B + cos A sin B - tg A tg B = (3/5.12/13) + (4/5.5/13) - (3/4.5/12)
= 36/65 + 20/65 - 5/16
= 56/65 - 5/16
= 896-325 / 1040
= 571/1040