Find the definding set of the function: y= √(1 - Cos3x ) / (1 + Sin4x )

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Can someone me out here number 4 plz

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24