Question

EXERCÍCIOS:

Determine o valor do seno e do cosseno de cada arco: 


135° 

 
                                                      

5π / 4        


                                             

5π      

 
                                                   

300º     


                                                  

315º     

                                                  
                                                 

13π / 6              

 
 

Coloque (V) para verdadeiro ou (F) para Falso:

 
 

sen 45º = sen 225º    (_____)

                                            

sen 45º = sen 135º    ( _____)


cos 30º = cos 150º    (_____)


d) cos 150º = sen 150º   (_____)
 





ALGUÉM ME AJUDA, PFV?​

Answer 1

$\mathsf{\sin(135^{\circ})=\dfrac{\sqrt{2}}{2}}$

$\mathsf{\cos(135^{\circ})=\dfrac{\sqrt{2}}{2}}$

$\mathsf{\sin(\dfrac{5\pi}{4})=-\dfrac{\sqrt{2}}{2}}$

$\mathsf{\cos(\dfrac{5\pi}{4})=-\dfrac{\sqrt{2}}{2}}$

$\mathsf{\sin(300^{\circ})=-\dfrac{\sqrt{3}}{2}}$

$\mathsf{\cos(300^{\circ})=\dfrac{1}{2}}$

$\mathsf{\sin(315^{\circ})=-\dfrac{\sqrt{2}}{2}}$

$\mathsf{\cos(315^{\circ})=\dfrac{\sqrt{2}}{2}}$

$\mathsf{\sin(\dfrac{13\pi}{6})=\dfrac{1}{2}}$

$\mathsf{\cos(\dfrac{13\pi}{6})=\dfrac{\sqrt{3}}{2}}$

2)

a) F

b) V

c) F

d) F