2 years ago

Marcus jumped “x” feet.

Mathematics

1 answer:

Ket [755]2 years ago

8 0

Answer:

Do u know the answer

Step-by-step explanation: I am doing a test pls help

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A polyhedron with two parallel congruent faces called bases connected by parallelogram faces is called a...

lisov135 [29]

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right prism

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If the faces are rectangles, then this prism is called a "right prism"

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2 years ago

I will give thanks and five stars to the person that helps me.

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2 years ago

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q?

Phantasy [73]

Answer:

$\cos (a-b)=\cos a \cos b+\sin a \sin b$

Step-by-step explanation:

Given : $\cos (180^{\circ}-q)=-\cos q$

We have to write which identity we will use to prove the given statement.

Consider $\cos (180^{\circ}-q)=-\cos q$

Take left hand side of given expression $\cos (180^{\circ}-q)$

We know

$\cos (a-b)=\cos a \cos b+\sin a \sin b$

Comparing , we get, a= 180° and b = q

Substitute , we get,

$\cos (180^{\circ}-q)=\cos 180^{\circ} \cos (q)+\sin q \sin 180^{\circ}$

Also, we know $\sin 180^{\circ}=0$ and $\cos 180^{\circ}=-1$

Substitute, we get,

$\cos (180^{\circ}-q)=-1\cdot \cos (q)+\sin q \cdot 0$

Simplify , we get,

$\cos (180^{\circ}-q)=-\cos (q)$

Hence, use difference identity to prove the given result.

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3 years ago

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