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Cosine Calculator

Trigonometric cosine calculator

Law of cosine formulas

  • a2 = b2 + c2 - 2bc * cos(A)
  • b2 = a2 + c2 - 2ac * cos(B)
  • c2 = a2 + b2 - 2ab * cos(C)

Cosine table

Degrees
Radians
cos

0
0
1

30
π / 6
√ 3 / 2

45
π / 4
1 / √ 2

60
π / 3
1 / 2

90
π / 2
0

180
π
-1

270
3π / 2
0

360
2π
1


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Popular Results

  • Cosine of 47 radians
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  • Cosine of 212 radians
  • Cosine of 29 degrees
  • Cosine of 0 degrees

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