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3 years ago

14

What is the sine and cosine of 240

2 answers:

belka [17]3 years ago

7 0

Sin(240) = -√(3)/2
sin(240) = 2sin(120)cos(120)
sin(240) = 2[2sin(60)cos(60)cos(120)]
sin(240) = 2[2[2sin(30)cos(30)cos(60)cos(120)]]
sin(240) = 2[2[2[2sin(15)cos(15)cos(30)cos(60)cos(120)]]]
sin(240) = 16sin(15)cos(15)cos(30)cos(60)cos(120)

cos(240) = ⁻¹/₂
cos(240) = cos¹⁶(15) - sin¹⁶(15)

harina [27]3 years ago

3 0

Sine:
0.94544515492
Cosine:
<span>0.32578130553
</span>

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