Answer:
sin 90
Step-by-step explanation:
cos (0)
Using the unit circle, we know that cos 0=1
sin 1 and cos 1 are not equal to 1
sin 90 =1
tan 90 = sin 90/ cos 90 = 1/0 =undefined
The answer is the first answer is the first option.

Yes it is a function because non of the X values are repeating
Answer:
2435
Step-by-step explanation:
Answer is below..............