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kondor19780726 [428]
3 years ago
10

If θ is a first-quadrant angle in standard position with P(u, v) = (3, 4), evaluate cos 2 θ . -7/25 -1/5 7/25

Mathematics
1 answer:
Grace [21]3 years ago
6 0

Answer:

-7/25.

Step-by-step explanation:

From the given point P we see that the hypotenuse =  √(3*2 + 4^2) = 5.

So cos  θ = 3/5

cos 2 θ =  2 cos^2 θ - 1

= 2 * (3/5)^2 -1

= -7/25.

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Prove that 1+cot²A=cosec²A​
o-na [289]

Answer:

see explanation

Step-by-step explanation:

Consider the left side

1 + cot²A

= 1 + \frac{cos^2A}{sin^2A}

= \frac{sin^2A+cos^2A}{sin^2A}

= \frac{1}{sin^2A}

= cosec²A

= right side, thus proven

6 0
3 years ago
Which is bigger 600 km or 5 m
Lina20 [59]
600 km=600,000 m
So 600km is bigger than 5 m
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4 years ago
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TELE
Aleonysh [2.5K]

Answer:

$23271.49

Step-by-step explanation:

The function C(t) = C(1 + r)^{t} models the rise in the cost of a product that has a cost of C today, subject to an average yearly inflation rate of r for t years.

Now, if the average annual rate of inflation over the next 8 years is assumed to be 2.5% then we have to find the inflation-adjusted cost of a $19100 motorcycle after 8 years.

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8 0
3 years ago
You just bought a dog and need to put a fence around your yard. If your yard is 22.5 ft by 28.5 how many feet of fencing will yo
Diano4ka-milaya [45]

Answer:

102 feet of fencing.

Step-by-step explanation:

Since this is asking to <u> enclose </u> the yard, it is a perimeter question.

22.5 x 2 = 45

28.5 x 2 = 57

45 + 57 = 102

102 is your answer.

Hope this helps.

4 0
3 years ago
Read 2 more answers
Surface area helpp needed
Firlakuza [10]

Answer:

144 un²

Step-by-step explanation:

Front Parallelogram = 5 x 11 = 55

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Total =

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144 un²

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

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