Solve the proportion
7/5=21/x

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

These question are hard can you me with answers

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤