Complementary Angle Relationship

What is $\\sin(30\degree)$?

Two acute angles in a right triangle are $A$ and $B$. What must be true about $A + B$?

In a right triangle, the right angle is at vertex $C$. The two acute angles are $A$ and $B$, where $B = 90\degree - A$.
The side opposite $A$ has length 3 and the hypotenuse has length 5.

What is $\\cos(B)$?

If $\\sin(x) = \\cos(35\degree)$, find $x$. Enter the value in degrees.

If $\\cos(x) = \\sin(20\degree)$, find $x$. Enter the value in degrees.

If $\\sin(x) = \\cos(x + 10\degree)$, find $x$. Enter the value in degrees.

Which expression is equivalent to $\\sin(50\degree)$?

If $\\sin(25\degree) = \\cos(y)$, what is $y$?