
via the angle sum formula of sin


which proves the second choice
the third choice is wrong since for x=0,y=0 it will show that 2=1 which is incorrect
for the fourth one you can do some thing similar to choice one just expand the sum formula of sin and that should be true too
so
the first , the second and the fourth are all true
The value of that fraction depends on the value of 'x'. Whatever 'x' happens
to be at the moment, the fraction is equal to about 61.1% of it. And if 'x' ever
changes, then the value of the fraction also changes, immediately.
Answer: All real numbers
Step-by-step explanation:
All real numbers
Interval Notation:
(
−
∞
,
∞
)
(-∞,∞)
Answer:
0.04
Step-by-step explanation: