Question

Carilah nilai perbandingan sudut a yang lain dari sin a 2/5

Answer 1

C =  √5²-2²
  = √25-4
  = √21
  = 3√3

cos a = 3√3/5
tan a = 2/3√3
cot a = 3√3/2
sec a = 5/3√3
csc a = 5/2