Cos²A=1/(1+tg²A)=1/(1+(√6/12)²)=1/(1+6/144)=1/(150/144)=144/150
SinA=√1-Cos²A=√1-144/150=√6/150=√0.04=0.2
Cos²A=1/(1+tg²A)=1/(1+(√6/12)²)=1/(1+6/144)=1/(150/144)=144/150
SinA=√1-Cos²A=√1-144/150=√6/150=√0.04=0.2