Select the functions that have a value of 0.

sin0°
cos0°
tan0°
csc0°
sec0°
cot0°

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start

What is the definition of a surd.give an example.