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Nitella [24]
2 years ago
12

Given any triangle ABC with corresponding side lengths a,b,c the law of cosines states:? Can someone explain to me how I get thi

s
English
1 answer:
a_sh-v [17]2 years ago
4 0
As per convention:
- the angle at A is named A, the angle at B is named B, and the angle at C is named C
- the side of leght a is the side opposed to A, the side of length b is opposed to B, and the side of length c is opposed to C.

Now just state the law of cosines:

c^2 = a^2 + b^2 - 2ab cos(C)

Also, a^2 = c^2 + b^2 - 2bc cos (A)

And, b^2 = a^2 + c^2 - 2ac cos (B)

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Answer:

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Giving background information about the story. For example, in a sci-fi book, it may be useful to include a description of the alien world, perhaps in a scene that illustrates its essential characteristics and functioning, so as not to confuse readers by plunging them into a completely foreign world in the first chapter (and having to explain it then or leave them lost, which may lead to disinterest).

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Giving information from a different point of view. The story is written in first person, and the prologue is in third person. The prologue focuses on a secret of one of the characters (which the main character would have no way of knowing, and the author would not otherwise be able to tell the reader due to the first person perspective).

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2 years ago
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The structure of the story builds suspense by making the narrative into a quest.

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The first example one can see is in the beginning when the author describes the particular difficulty of the quest for the top.

Thus starting medias res and then going back to give details.

The second example is that the narrator often employs descriptive passages just before a new development to draw out the moment.

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