# 7.2E: Trigonometry ya Triangle ya kulia (Mazoezi)

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Kwa mazoezi yafuatayo, tumia urefu wa upande ili kutathmini.

17. $$\cos \frac{\pi}{4}$$

18. $$\cot \frac{\pi}{3}$$

19. $$\tan \frac{\pi}{6}$$

20. $$\cos \left(\frac{\pi}{2}\right)=\sin \left(\longrightarrow^{\circ}\right)$$

21. $$\csc \left(18^{\circ}\right)=\sec \left(\longrightarrow^{\circ}\right)$$

Kwa mazoezi yafuatayo, tumia taarifa iliyotolewa ili kupata urefu wa pande nyingine mbili za pembetatu sahihi.

22. $$\cos B=\frac{3}{5}, a=6$$

23. $$\tan A=\frac{5}{9}, b=6$$

Kwa mazoezi yafuatayo, tumia Kielelezo 1 ili kutathmini kila kazi ya trigonometric.

Kielelezo 1

24. $$\sin A$$

25. $$\tan B$$

Kwa mazoezi yafuatayo, tatua pande zisizojulikana za pembetatu iliyotolewa.

26.

27.

28. Ngazi ya 15-ft hutegemea jengo ili angle kati ya ardhi na ngazi ni$$70^{\circ} .$$ Jinsi ya juu ngazi kufikia upande wa jengo? Pata jibu kwa maeneo manne ya decimal.

29. Pembe ya mwinuko hadi juu ya jengo huko Baltimore inapatikana kuwa digrii 4 kutoka ardhini kwa umbali wa maili 1 kutoka msingi wa jengo. Kutumia habari hii, pata urefu wa jengo. Pata jibu kwa maeneo manne ya decimal.