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ivolga24 [154]
3 years ago
15

How are the sin 30° and the cos 60° related? Explain using complete sentences.

Mathematics
1 answer:
enyata [817]3 years ago
7 0
         Cos 30° and sin 60° have the same points on the unit circle.
         cos 30° = 1/2. sin 60° = 1/2
         30° and 60° are complement angles ( 30° + 60° = 90° ).
         sin α = cos ( 90° - α )
         Answer: sin 30° = cos 60°
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Answer:

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Step-by-step explanation:

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Complete the table.<br> f(y) = 4y2 - 4v<br> f(v<br> -4<br> -3<br> -2<br> -1
Nastasia [14]

Answer:

f(y) = 4y2 - 4v

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Step-by-step explanation:

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3 years ago
Derivatives of inverse trigonometric functions please explain answers
Jobisdone [24]

I'll explain how to do the first one:-

y = cos-1(x2)

This can be described as ' a function of a function'   x^2 is a function of x and cos-1(x^2) is a function of x^2.

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Personally I find this  easier to understand if i let u = x^2, so

If y = f(u) and u is a function of x then

dy/dx = dy/ du * du/dx

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= -2x / √(1 - (x^2)^2)

= -2x / √(1 - x^4)

I hope this helps. but if not. you might like to employ the formulae in the question - The square boxes contain the 'u' s in my answer. These formulae are equivalent to my explanation.

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3 years ago
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Montano1993 [528]
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6 0
3 years ago
What is the measure of the central angle of a circle with radius 15 ft that intercepts a 10 ft arc?
olga2289 [7]
  • L=10ft
  • R=15ft
  • We have to find theta

\Large{\underline{\sf Solution:-}}

\\ \sf\dashrightarrow L=\dfrac{\Theta}{180}\times \pi r

\\ \sf\dashrightarrow 10=\dfrac{\Theta}{180}\times 3.14\times 15

\\ \sf\dashrightarrow 10=\dfrac{\Theta}{180}\times 47.1

\\ \sf\dashrightarrow \Theta=\dfrac{10(180)}{47.1}

\\ \sf\dashrightarrow \Theta=\dfrac{1800}{47.1}

\\ \sf\dashrightarrow \Theta=38.2°

5 0
2 years ago
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