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3 years ago

I am not quite sure how to do these.

Mathematics

1 answer:

EleoNora [17]3 years ago

6 0

Sin (Π/2 - theta) = sin(Π/2) * cos(theta) - cos(Π/2) * sin (theta)
and as we know sin(Π/2) =1 , cos(Π/2)=0
so sin(Π/2 - theta) = 1* cos(theta) - 0* sin(theta)= cos(theta)
2nd cos(180+ theta) = cos(180)*cos(theta) - sin(180)* sin(theta)
,,, so , cos(180+theta) = -cos(theta)

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4 years ago

Read 2 more answers

A rectangular parking lot has a length 20 H more

leva [86]

Let the width = X

The length would be X + 20

Area = Length x width:

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Simplify:

2400 = x^2 + 20x

Subtract 2400 from both sides:

x^2 + 20x - 2400 = 0

Factor:

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Solve for both x's:

x = 40 and x = -60

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3 years ago

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aniked [119]

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3 years ago

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Natasha_Volkova [10]

Answer:

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3 years ago

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Misha Larkins [42]

Answer:

Step-by-step explanation:

$\sqrt{x } \geqslant 1$

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3 years ago