O valor exato de cos ⁡ 3 π 4 \cos\ \frac{3\pi}{4} cos 4 3 π é:

− 2 2 -\frac{\sqrt{2}}{2} − 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 2 \frac{\sqrt{2}}{2} 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Trigonometria

Authored by Cláudia Oliveira

Mathematics

11th Grade

Used 10+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

20º em radianos é:

$\frac{\pi}{5}$

$\frac{\pi}{9}$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

$\frac{\pi}{5}rad\$ corresponde a:

32º

36º

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

-300º pertence ao:

1.º quadrante

2.º quadrante

3.º quadrante

4.º quadrante

MULTIPLE CHOICE QUESTION

1 min • 1 pt

2215º pertence ao:

1.º quadrante

2.º quadrante

3.º quadrante

4.º quadrante

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

O valo exato de sen 30º é:

$\frac{1}{2}$

$\frac{\sqrt{2}}{2}$

$\frac{\sqrt{3}}{2}$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

O valor exato de
$\cos\ \frac{3\pi}{4}$ é:

$\frac{\sqrt{2}}{2}$

$-\frac{\sqrt{2}}{2}$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

cos 90º é:

-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

$-1\le sen\ \alpha\le1$

Esta proposição é verdadeira ou falsa?

Verdadeira

Falsa

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