Fanhasbi
1) a. 60 x π/180 = 60π/180 = π/3 rad b. 330 x π/180 = 330π/180 = 11π/6 rad
2) a. 2π/3 rad = 2π/3 x 180/π = 120° b. 7π/5 rad = 7π/5 x 180/π = 252°
4) a. sin(-330) = -sin (-30) = 1/2 b. tan 225 = sin 225/cos 225 = sin 45/cos 45 = 1/2 √2 / 1/2√2 = 1 c. cos 1230 = cos (1230 - (3 x 360)) = cos (1230 - 1080) = cos 150 = 1/2 √3
a. 60 x π/180 = 60π/180 = π/3 rad
b. 330 x π/180 = 330π/180 = 11π/6 rad
2)
a. 2π/3 rad = 2π/3 x 180/π = 120°
b. 7π/5 rad = 7π/5 x 180/π = 252°
4)
a. sin(-330) = -sin (-30) = 1/2
b. tan 225 = sin 225/cos 225 = sin 45/cos 45 = 1/2 √2 / 1/2√2 = 1
c. cos 1230 = cos (1230 - (3 x 360)) = cos (1230 - 1080) = cos 150 = 1/2 √3