Penjelasan dengan langkah-langkah:
6] f(x) = 1 - 3x
y = 1 - 3x
3x = 1 - y
x = (1 - y)/3
f^(-1) (x) = (1 - x)/3
7] 15°
= 15° . π/180°
= 1/12 . π rad
8] AC = √(25² - 24²)
AC = √(625 - 576)
AC = √(49)
AC = 7 cm
cos C = AC/BC
cos C = 7/25
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Penjelasan dengan langkah-langkah:
6] f(x) = 1 - 3x
y = 1 - 3x
3x = 1 - y
x = (1 - y)/3
f^(-1) (x) = (1 - x)/3
7] 15°
= 15° . π/180°
= 1/12 . π rad
8] AC = √(25² - 24²)
AC = √(625 - 576)
AC = √(49)
AC = 7 cm
cos C = AC/BC
cos C = 7/25