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Trigonometria

Authored by Luís ProfDMCE

Mathematics

9th Grade

CCSS covered

Used 185+ times

Trigonometria
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 5 pts

Media Image

Na figura pode observar-se o triângulo retângulo [ABC].
O valor da medida do comprimento do cateto adjacente a

 α\alpha  é:

 22  

 33  

 11  

 44  

Tags

CCSS.HSG.SRT.C.8

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Relativamente ao triângulo, o valor do sin  α\alpha  é:

 12\frac{1}{2}  

 3\sqrt{3}  

 22  

 32\frac{\sqrt{3}}{2}  

Tags

CCSS.HSG.SRT.C.6

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Qual dos seguintes valores não pode representar o cosseno de um ângulo agudo?

23\frac{2}{3}

54\frac{5}{4}

53\frac{\sqrt{5}}{3}

−1−2\frac{-1}{-2}

Tags

CCSS.HSF.TF.A.2

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Observa o triângulo retângulo.

Os valores de x e y são respetivamente:

66 e 44

44 e 66

6,226,22 e 4,774,77

4,774,77 e 6,226,22

Tags

CCSS.HSG.SRT.C.8

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Os triângulos retângulos [ABC] e [DEF] são semelhantes.

O valor de sin (DF̂E) é:

23\frac{2}{3}

21313\frac{2\sqrt{13}}{13}

32\frac{3}{2}

313\frac{3}{\sqrt{13}}

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Qual o valor em graus, da amplitude do ângulo?


 sin⁡ 30º = cos⁡ (...)\sin\ 30º\ =\ \cos\ \left(...\right)  

 30º30º  

 60º60º  

 45º45º  

 90º90º  

Tags

CCSS.HSG.SRT.C.7

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Sabe-se que:
 sin⁡ 60º = 32\sin\ 60º\ =\ \frac{\sqrt{3}}{2}  e  cos⁡ 60º = 12\cos\ 60º\ =\ \frac{1}{2}  .


Os valores de  sin⁡30º, cos⁡ 30º e tan⁡ 30º\sin30º,\ \cos\ 30º\ e\ \tan\ 30º  são respetivamente:

 12 , 32 e 33\frac{1}{2}\ ,\ \frac{\sqrt{3}}{2}\ e\ \frac{\sqrt{3}}{3}  

 32 , 12 e 33\frac{\sqrt{3}}{2}\ ,\ \frac{1}{2}\ e\ \frac{\sqrt{3}}{3}  

 32 , 33 e 12\frac{\sqrt{3}}{2}\ ,\ \frac{\sqrt{3}}{3}\ e\ \frac{1}{2}  

 12 , 33 e 32\frac{1}{2}\ ,\ \frac{\sqrt{3}}{3}\ e\ \frac{\sqrt{3}}{2}  

Tags

CCSS.HSG.SRT.C.6

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