Answer:
5+12
there is no equals sign in an expression so it is just that
Answer: B
Step-by-step explanation:
Answer:
sin^2α
Step-by-step explanation:
I will just pose x instead of alpha here to make things simpler

we know that sin^2x = 1 - cos^2x so...


we can rewrite using trigonometric identities (tan = sin/cos)...

If x +23 = 9, then, x = 9-23.
So x = -14