tentukan nilai dari cos , cod , csc , sin , tan berikut

a. cos(3π) = -1

b. cot(π/3)
 = cos(π/3) / sin(π/3)
 = (1/2) / (√3 / 2)
 = 1/√3
 = √3 / 3

a. sin(3π/2) = -1

b. Tan(-π/4)
= sin(-π/4) / cos(-π/4)
= -sin(π/4) / cos(π/4)
= -(√2 / 2) / (√2 / 2)
= -1

c. Sec(2π/8)
= Sec(π/4)
= 1 / cos(π/4)
= 1 / (√2 / 2)
= 2/√2
= √2