Carilah nilai dari :
a.) sin 120° b.) cos 300° c.) tan 150° d.) sec 210° e.) cot 330° f.) cosec 120°
beserta cara penyelesaiannya yang rinci + rumus ?
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= sin 60
=
b) cos 300 = cos (360 - 60)
= cos 60
= 1/2
c) tan 150 = tan (180 - 30)
= - tan 30
= -
d) cos 210 = cos (180 + 30)
= - cos 30
= -
sec 210 = 1/cos 210
= 1:(- )
=
e) tan 330 = tan (360 - 30)
= - tan 30
= -
cot 330 = 1/tan 330
= 1:(- )
= -
f) sin 120 = sin (180 - 60)
= sin 60
=
cosec 120 = 1/sin 120
= 1:()
=