Evaluate sin^-1 square root2/2

Which statement is true 1.the pythagorean theorem can be used to find the missing side of any triangle 2.the pythagorean theorem can be used to find the missing side of any polygon 3. the pythagorean theorem can be used to find the missing side of any right triangle 4.the pythagorean theorem can be used to find the missing side of any isosceles triangle

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Rounded to the nearest tenth, what is the value of x