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Salsk061 [2.6K]
3 years ago
14

You are given that sin(a)=8/17, with a in quadrant ii, and sin(b)=−5/13, with b in quadrant iii. find cos(a−b)

Mathematics
1 answer:
masha68 [24]3 years ago
5 0
1.5 is the answer too your question sir thanks.
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Ma poate ajuta cineva la acesta problema: pe o drepta g considerati punctele D, R,P si T coliniare in aceasta ordine astfel inca
valina [46]

Answer:

Givens

DR=PT=3cm and RP=4cm

Points D, R, P and T are collinear.

The image attached shows a representation of this problem.

By sum of segments, we have

DT=DR+RP+PT

Replacing all given values, we have

DT=3+4+3=10 \ cm

Therefore, the segment DT is 10 centimeters long.

Now, we know that point E is the center of segment RP, which means is a middle point, divides the segment equally. So, to prove that segment DT is symmetrical regarding point E, we need to prove that both sides are equal.

RE=EP=2cm, by definition of middle point.

By sum of segments, we have

DR+RE=3+2=5cm\\EP+PT=5cm

Which means DR+RE=\frac{DT}{2}\\ EP+PT=\frac{DT}{2}.

Therefore, segment DT is symmetrical regarding point E.

8 0
3 years ago
Please help me this is my final!!!
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Answer:

it is a, or n=15

Step-by-step explanation:

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Which of the following equations describes the line shown
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(-4,4) , (2,1)
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a dog is going to be tied to a stake placed in the yard. the owners want the dog to have the largest space available in their tr
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