Jawab:
sudut Relasi dengan sudut lancip
Penjelasan dengan langkah-langkah:
2.
a. cos 120 = cos (180 - 60) = - cos 60 = 1/2
b. sin 135 = sin (180 - 45) = sin 45 = 1/2 √2
c. cos 240 = cos (180 + 60) = - cos 60 = - 1/2
d. tan 300 = tan ( 360 - 60) = - tan 60 = - √3
3.
a. sin 870 = sin (2. 360 + 150)= sin 150
sin870 = sin 150 = sin (180 - 30)
sin 870 = sin 30 = 1/2
b. cos 1140 = cos ( 2. 360 + 420)
cos 1140 = cos 420 = cos (360 + 60)
cos 1140 = cos 60 = 1/2
c. tan 1140 =tan (2. 360 + 420)
tan 1140 = tan 420 = tan (360 + 60)
tan 1140 = tan 60 = √3
c.
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Verified answer
Jawab:
sudut Relasi dengan sudut lancip
Penjelasan dengan langkah-langkah:
2.
a. cos 120 = cos (180 - 60) = - cos 60 = 1/2
b. sin 135 = sin (180 - 45) = sin 45 = 1/2 √2
c. cos 240 = cos (180 + 60) = - cos 60 = - 1/2
d. tan 300 = tan ( 360 - 60) = - tan 60 = - √3
3.
a. sin 870 = sin (2. 360 + 150)= sin 150
sin870 = sin 150 = sin (180 - 30)
sin 870 = sin 30 = 1/2
b. cos 1140 = cos ( 2. 360 + 420)
cos 1140 = cos 420 = cos (360 + 60)
cos 1140 = cos 60 = 1/2
c. tan 1140 =tan (2. 360 + 420)
tan 1140 = tan 420 = tan (360 + 60)
tan 1140 = tan 60 = √3
c.