Jika diketahui cos a = 12/13 , a dikuadran i , maka tentukan nilai perbandingan trigonometri lainya

cos = samping/miring
cos a = 12/13

samping = 12
miring = 13

depan² = miring² - samping²
depan² = 13² - 12²
depan² = 169 - 144
depan = √25
depan  = 5

sin a = depan/miring = 5/13
tan a = depan/samping = 5/12
cotan a = samping/depan = 12/5
cosec a = miring/depan = 13/5
sec a = miring/ samping = 13/12

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