Answer: 
Step-by-step explanation:
Alright, lets get started.
The given expression is given as :

We know quotient identity as :

Similarly, we know reciprocal identity as :

lets plug the value of cot and sec in given expression

cos will be cancelled, remaining will be

Using reciprocal identity again, that will equal to :
................... Answer (A)
Answer:
10 <
< 11
Step-by-step explanation:
The square root of 111 is approximately 10.536.
A number smaller than this is 10.
A number larger than this is 11.
X^2/y + x^2/z =
10^2/(-5) + 10^2/(-2) =
100/(-5) + 100/(-2) =
-20 - 50 =
-70
One possible system is
1x + 3y = 4
2x + 6y = 8
Note how 2 is twice as large as 1, 6 is twice as large as 3, and 8 is twice as large as 4.
In other words, the second equation is the result of multiplying both sides of the first equation by 2.
1x+3y = 4
2*(1x+3y) = 2*4
2x+6y = 8
Effectively the two equations in bold are the same which produces the same line. The two lines overlap perfectly to intersect infinitely many times. An intersection is a solution.