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2 years ago

4. Which expression is equivalent to sin(50)º?

Mathematics

1 answer:

jasenka [17]2 years ago

3 0

Answer:

cos(400)

Step-by-step explanation:

Useful things:

Cofunction identity: sin(x)=cos(90-x)

Sine and cosine have period of 360 degrees.

So sin(50)=cos(40) by cofunction identity.

Since cosine has period of 360 degrees then cos(40)=cos(360+40).

That simplifies to cos(400).

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3 years ago

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Answer:

Step-by-step explanation:

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<em>Hope that helps!</em>

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7 0

2 years ago

Suppose the roots of the equation 2x^2−5x−6=0 are α and β.Find the quadratic equation with roots 1/α and 1/β.

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Answer:

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Step-by-step explanation:

Given

2x² - 5x - 6 = 0 ← in standard form

with a = 2, b = - 5, c = - 6, then

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product of roots = $\frac{c}{a}$ = - 3, then

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Hence the required equation is

x² + $\frac{5}{6}$ x - $\frac{1}{3}$ = 0 or

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3 years ago

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I believe the answer is 3x(3x + 2)

Step-by-step explanation:

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