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Anton [14]
3 years ago
8

How many number of terms -4 has

Mathematics
2 answers:
alex41 [277]3 years ago
6 0

Answer:

it only has 1 term

Rashid [163]3 years ago
3 0
-4 only has 1 term :)
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Multiply ()
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Step-by-step explanation:

b, i'm not sure but thats what i think.

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I have 2 congruent, parallel, rectangular bases.
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The 3D figure formed is a <u>Cuboid</u><u>.</u>

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Proportion is ________________
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3 years ago
Root 3 cosec140° - sec140°=4<br>prove that<br><br>​
Lorico [155]

Answer:

Step-by-step explanation:

We are to show that \sqrt{3} cosec140^{0} - sec140^{0} = 4\\

<u>Proof:</u>

From trigonometry identity;

cosec \theta = \frac{1}{sin\theta} \\sec\theta = \frac{1}{cos\theta}

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From trigonometry, 2sinAcosA = Sin2A

= \frac{\sqrt{3}cos140-sin140 }{sin140cos140} \\\\=  \frac{\sqrt{3}cos140-sin140 }{sin280/2}\\=  \frac{4(\sqrt{3}/2cos140-1/2sin140) }{2sin280}\\\\= \frac{4(\sqrt{3}/2cos140-1/2sin140) }{sin280}\\since sin420 = \sqrt{3}/2 \ and \ cos420 = 1/2  \\ then\\\frac{4(sin420cos140-cos420sin140) }{sin280}

Also note that sin(B-C) = sinBcosC - cosBsinC

sin420cos140 - cos420sin140 = sin(420-140)

The resulting equation becomes;

\frac{4(sin(420-140)) }{sin280}

= \frac{4sin280}{sin280}\\ = 4 \ Proved!

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The x coordinate stays the same  but y coordinate changes sign  so it will be a reflection in the x-axis.
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