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△ Trigonometry

Cosine

Right triangle ratio

Formula

cos θ = adjacent / hypotenuse

Right triangle ratio

Example

  • adj = 4
  • hyp = 5
  • cos θ = 4/5 = 0.8
Result 0.8
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Grade 9 · Cosine

Easy 20 questions Worksheet #40064 For Cosine

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MathDigits Worksheet

Grade 9 · Cosine

Easy · 20 questions · Worksheet #40064 · Cosine

Name: ________________________

Date: ______________ Score: ______

  1. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  2. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  3. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  4. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  5. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  6. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  7. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  8. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  9. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  10. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  11. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  12. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  13. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  14. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  15. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  16. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  17. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  18. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  19. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________
  20. fill In a right triangle, adjacent = 4, hypotenuse = 5. Find cos θ. (cos = adj/hyp)
    ______________________________

Updated July 2026

FAQs

What is Cosine?

Cosine (cos) is a trigonometry relationship written as Right triangle ratio or cos θ = adjacent / hypotenuse. Students use it to solve unknowns when enough values are known.

How do you calculate Cosine step by step?

Write Right triangle ratio, substitute the known numbers carefully, then simplify. Worked walkthrough: adj = 4 hyp = 5 cos θ = 4/5 = 0.8.

When is Cosine taught in school?

Cosine usually appears in trigonometry units during middle or secondary school. Match difficulty with MathDigits grade worksheets so practice fits the curriculum year.

What is a real example of Cosine?

On this page the worked result is 0.8. Generate a formula worksheet below for more unique practice sets.

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