Diketahui Cos B°= -2/3, Carilah: Sin B, Cot B, Tan B, Cosec B

cos b° = -2/3
cos = samping/miring (segitiga siku siku)

depan= √3²-(-2)² (rumus phytaghoras)
depan= √9-4
depan=√5


sin b° = depan/miring
sin b° = √5/3

tan b° = sin/cos
tan b° = (√5/3) / (-⅔)
tan b° = √5/3 ÷ -⅔
tan b° = √5/3 × -3/2
tan b° = - √5/2


cot b° = 1/tan
cot b° = 1/√5/2
cot b° = 1 ÷ √5/2
cot b° = 1 × 2/√5
cot b° = 2/√5

cosec b° = 1/sin
cosec b° = 1/√5/3
cosec b° = 1 ÷ √5/3
cosec b° = 1 × 3/√5
cosec b° = 3/√5




semoga membantu, maaf kalo salah:')