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Novay_Z [31]
3 years ago
6

What’s cos10 in terms of sine? Any help is greatly appreciated ʕ•ᴥ•ʔ

Mathematics
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:  Since 10° is less than 90, we can express this in terms of a co-function. cos(θ) = sin(90 - θ) cos(10) = sin(90 - 10) cos(10) = sin(80)

Step-by-step explanation: Note that cos10° is periodic: cos (10° + n × 360°) = cos 10 degrees, n . There are more formulas for the double angle (2 × 10°), half angle ((10/2)°) as well as the sum, difference and products of two angles such as 10° and β.

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What are the solutions of the quadratic equation 4x2 - 8x – 12 = 0?
Juliette [100K]

Answer:

see bottom

Step-by-step explanation:

divide through by 4

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x2 - 3x + x - 3 = 0

(x2 - 3x) + (x - 3) = 0

x(x - 3) + 1(x - 3) = 0

(x + 1) (x - 3) = 0

x + 1 = 0 and x - 3 = 0

x = -1 and x = 3

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3 years ago
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3 years ago
Math help me please n
BARSIC [14]

Answer:

Step-by-step explanation:

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4 0
3 years ago
Y is directly proportional to x^2. It is known that y=10 for a particular value of x. Find the value of y when the value of x is
Mandarinka [93]
<span>Y is directly proportional to x^2. It could be represented by the expression:

y </span>α x^2

We can make it into an equality by inserting the proportionality constant, k.

y = kx^2

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Therefore, when the value of x is halved, y is equal to 10/4.
3 0
4 years ago
Why does each number only have one square root?
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Answer:

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Step-by-step explanation:

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