Across
- 3. The triangle α and β are 60° and 50°, what is γ?
- 5. In land surveying, trigonometry is used in the calculation of ... areas etc.
- 7. sin α=0:13 α=?
- 8. cos(2*π-x)=cos x, because in the IV period the cos is ...
- 10. 175° angle belongs to the ... period.
- 11. 839° is ... (what triangle?)
Down
- 1. What can be calculated by this formula? (π*r2)
- 2. ... theorem(a2+b2=c2).
- 4. cos α=b:c=side adjacent:...
- 6. What is a:sin α=b:sin β=c:sin γ?
- 9. He has been described as ''the father of trigonometry''.