B ) sin² x = 1 - cos² x
sin² x + cos² x = 1 ( correct )
D ) cot² x = csc² x - 1
cos²x / sin²x = 1/sin²x - 1 = (1-sin²x) / sin²x = cos²x/sin²x
Identities are B ) and D).
Answer:
1 and 1/2 hours
Step-by-step explanation:
2 is half of 4, so it would take half the time it would take to do 4 lawns, so it would be 1.5 hours.
Answer:
c= -18
Step-by-step explanation:
c+4c= -90
combine like terms
5c= -90
Divide by 5 on both sides
c= -18
The last option is the answer
X =3
