diketahui tan alfa -8/15 alfa di kuadran 2. tentukan nilai perbandingan lainnya

jawab
trigonometri

tanA = -8/15 =y/x
triple  x,y,r = 15, 8 , 17
A di KDII

sinA = y/r = 8/17
cos A =- x/r = - 8/17
cot A = -15/8
sec A = -17/8
cosec A = 17/8