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Wittaler [7]
3 years ago
12

What are the sine and cosine of 4π/3?

Mathematics
1 answer:
nignag [31]3 years ago
5 0

Answer:

See below.

Step-by-step explanation:

Sin (4π/3) = -sqrt(3)/2

Cos(4π/3) = -1/2

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Mia has 65 sea shells but How many more sea shells does she need to have 200 sea shells
timama [110]
135 sea shells more

65-200 equals to 135
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2 years ago
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Can someone please help me with these 2 math questions!
kondaur [170]

Step-by-step explanation:

The additional information is GD ≅ CD

 The additional information is ∠LQR ≅ ∠PQR

SSS ⇒ 3 sides in the 1st Δ ≅ 3 sides in the 2nd Δ

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) find a vector parallel to the line of intersection of the planes 5x − y − 6z = 0 and x + y + z = 1.
snow_tiger [21]
The cross product of the normal vectors of two planes result in a vector parallel to the line of intersection of the two planes.

Corresponding normal vectors of the planes are
<5,-1,-6> and <1,1,1>

We calculate the cross product as a determinant of (i,j,k) and the normal products

    i   j   k
   5 -1 -6
   1  1  1

=(-1*1-(-6)*1)i -(5*1-(-6)1)j+(5*1-(-1*1))k
=5i-11j+6k
=<5,-11,6>

Check orthogonality with normal vectors using scalar products
(should equal zero if orthogonal)
<5,-11,6>.<5,-1,-6>=25+11-36=0
<5,-11,6>.<1,1,1>=5-11+6=0

Therefore <5,-11,6> is a vector parallel to the line of intersection of the two given planes.
5 0
3 years ago
Which of the following is a solution to the equation x - 5/7 = -3/7
podryga [215]

Solve the equation:

          5              3
x  –  ——  =  –  ——
          7              7


           5
Add  ——  to both sides, so you get  x  isolated at the left-hand side:
           7

          5          5               3          5
x  –  ——  +  ——  =  –  ——  +  ——
          7           7              7           7

              3          5
x  =  –  ——  +  ——
              7           7


Now, add those fractions at the right-hand side of the equation:

          – 3 + 5
x  =  —————
               7

          2
x  =  ——     <———    this is the answer (first option:  2/7).
          7


I hope this helps. =)

8 0
3 years ago
10x + 4x 3 – 4 Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms.
weqwewe [10]
Guessing that the 3 was suppose to be an exponent.

The answer written in standard form is :
4x^3 + 10x - 4

This is called a cubic trinomial.
7 0
3 years ago
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