Question

calcule o valor da expressao y=tg180º+tg360º+tg0°

Answer 1

$y=tan(180^o)+tan(360^o)+tan(0^o)\\ \\ y=\frac{sen(180^o}{cos(180 ^o)}+\frac{sen (360^o)}{cos(360^o)}+ \frac{sen(0^o)}{cos(0^o)}\\ \\ y=\frac{0}{-1}+\frac{0}{1}+\frac{0}{1}=0$

Answer 2

tg 180 = 0
 tg 360 = 0  
tg 0 = 0 
 Portanto y = 0