The product of ![2.\left[\begin{array}{c}-1&0\\\end{array}\right]](https://tex.z-dn.net/?f=2.%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D-1%260%5C%5C%5Cend%7Barray%7D%5Cright%5D)
is ![\left[\begin{array}{c}-2&0\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7D-2%260%5Cend%7Barray%7D%5Cright%5D)
Option C is correct.
Step-by-step explanation:
We need to find the product of:
Solving
We will multiply 2 with the terms inside the matrix.
We will get:
So, the product of is
Option C is correct.
Keywords: Matrices
Learn more about Matrices at:
#learnwithBrainly
The answer is 168 because a foot is 12 inches and 12*14=168
Answer:
Step-by-step explanation:
area of base=6×6=36 m²
surface area of four walls=4×6×12=144 m²
area of top= area of four triangles=4×1/2×6×5=60 m²
total surface area=36+144+60=240 m²
Answer:
sin(-255°) = √2 + √6/4
Step-by-step explanation:
We need to find sin -255°
We know that sin(-a) = - sin(a)
so, sin(-255°) = - sin 255°
We know that 180° + 75° = 255°
Now we can write sin(255°) = sin(180° + 75°)
We can use the identity:
sin(x+y) = sin(x) cos(y)+cos(x)sin(y)
x = 180° , y = 75°
Solving,
sin(x+y) = sin(x) cos(y)+cos(x)sin(y)
sin(180° + 75°) = sin(180°) cos(75°)+cos(180°)sin( 75°)
sin(180°) = 0
cos(75°) = √6 -√2/4
cos(180°) = -1
sin( 75°) = √2 + √6/4
Putting values,
sin(180° + 75°) = 0 (√6 -√2/4) + (-1)(√2 + √6/4)
sin(180° + 75°) = -(√2 + √6/4)
We know that sin(-255°) = -sin(255°)
Putting value of sin(255°)
sin(-255°) = -(-(√2 + √6/4))
sin(-255°) = √2 + √6/4
