PLEASE HELP ASAP Which expression is not equal to 1?

A} sin θ csc θ
B} cos θ sec θ
C] tan θ cot θ
D} sin θ cos θ

Which parent function is an example of a piecewise function? answers: linear parent function quadratic parent function an exponential parent function absolute value parent function pls i’m sorry if this doesn’t make sense

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

15/16 as a decimal rounded to the nearest hundredth