Question

por favor me ajudem com essas aqui

Answer 1

$<var>cos x=\frac{\sqrt{2}}{2}</var>$

 

 

$<var>sen x={\sqrt {(1-\frac{2}{4})}=\frac{\sqrt2}{2}}</var>$ 

 

 

$<var>sec x=\frac{1}{cos x}=\frac{2}{\sqrt2}}=\sqrt2</var>$ 

 

 

$<var>cossec x=\frac{1}{sen x}=\frac{2}{\sqrt 2}=\sqrt 2 </var>$ 

 

 

Portanto

 

$<var>sec x +cossec x= \sqrt2+\sqrt 2=2\sqrt2</var>$