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Mademuasel [1]
3 years ago
10

Which expression is equivalent to cos 120 degrees

Mathematics
2 answers:
Savatey [412]3 years ago
6 0

Answer:

option b) cos 240 degrees.

Step-by-step explanation:

This means that the expression cos 120 degrees can also be written as cos 240 degrees.

This because cos 240 degrees = -1/2 = cos 120 degrees.

This happens because the second and third quadrants carry the same signs.

Read more on Brainly.in - https://brainly.in/question/5197628#readmore

rodikova [14]3 years ago
3 0

the answer is option b.

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Step-by-step explanation:

1. There are only 4 numbers including 5 that follow the "five or more" requirment, and the probability of spinning it once is 4/8, or 1/2. (The total sections is 8) Then we multiply 1/2 and 1/2 together to get the "two times in a row" requirement done. (1/2)*(1/2)= 1/4 is the probability.

2. There are two values on the spinner that are a multiple of 3, 3 itself and 6. Again, the total amount of numbers/sections is 8, so the probability of spinning a multiple of three is 2/8 or 1/4. The probability of spinning an odd number is 4/8 or 1/2. (1/2)*(1/4)=1/8 is the probability.

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5 0
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16 Answer
3 0
3 years ago
If the graph is reflected across the y-axis, what will be the equation of the new graph?
Bumek [7]

Answer:

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Step-by-step explanation:

we are given a exponential function

\displaystyle y =  {3}^{x}  + 1

we want to figure out the equation of the new graph reflected across the y-axis

remember that,

\rm\displaystyle (x,y) \xrightarrow{ \text{ reflection  over  y - axis}}( - x,y)

let y be 3^x+1 so,

\rm\displaystyle (x,y) \xrightarrow{ \text{ reflection  over  y - axis}}( - x, {3}^{ - x} + 1 )

hence,

the equation of the new graph

\displaystyle y =  { 3}^{ - x}  + 1

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