
<u>Step-by-step explanation:</u>
Here we have , cos x = -4/5 ( corrected as given -45 which is not possible ) ,
180° < x < 270° i.e. in third quadrant . We need to find tan(2x) . Let's find out:
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, since in third quadrant .
remains same .
Now , 
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Therefore,
.
Answer:
28cm✨
Step-by-step explanation:
The perimeter of the given square is a + a + a + a
7+7+7+7=28
Have a great time studying.
Step-by-step explanation:
f(-1)=3×(-1)²-4×(-1)
=3×1-4×(-1)
=3+4
=7
hope it helps.
Answer:
(x-2)(x^2 +2x +4)/x
Step-by-step explanation:
X minus two into X squared plus 2X plus 4 whole by X(this should be the right answer)
Answer: 
<u>Step-by-step explanation:</u>
There is 1 four out of 6 possible numbers = 