What is the sine and cosine of 240

Question

Toffee

Mathematics

21 October, 14:04

What is the sine and cosine of 240

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Answers (2)

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Kelsey Bolton · Answer 1

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)

Mylie Bradshaw · Answer 2

Sine:

0.94544515492

Cosine:

0.32578130553