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2 years ago

The trigonometric ratios sine and secant are reciprocals of each other true or false?

Mathematics

2 answers:

kodGreya [7K]2 years ago

7 0

True: The trigonometric ratios sine and secant are reciprocals of each other

jek_recluse [69]2 years ago

4 0

That's FALSE.

It's sine and cosecant that are reciprocals, as are cosine and secant, as well as tangent and cotangent.

The "co" or complementary functions are their corresponding non-complementary function applied to the complementary angle: cos(x) = sin(90-x), that kind of thing.

The non-co functions sine, secant and tangent all increase with increasing angle in the first quadrant. The co functions all decrease.

Since when sine increases its reciprocal decreases, its reciprocal must be one of the co functions, and of course it's cosecant.

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Estimate the rate at which the total personal income is rising in a metropolitan area. In 1999, the population of this area was

Natasha2012 [34]

Answer:

$X=\$1.64*10^9$

Step-by-step explanation:

From the question we are told that:

Population size $P=918000$

Rate of Population increase $\frac{dP}{dt}=9700$

Average annual income $I= \$34,549$

Rate of annual income increase $\frac{dI}{dt}=\$1300$

Generally the equation for Total Income is mathematically given by

$X=P \frac{dI}{dt}+I \frac{dP}{dt}$

$X=918000*1400+(9200*30593)$

$X=\$1.64*10^9$

6 0

2 years ago

Only answer #5 Please help me and thx and if u can answer #6 too if u can

Marianna [84]

Answer:

5. D

6. C

Step-by-step explanation:

Question 5

Lets plug in values of x and y into each equation to see which one works for the entire data set...

y=2x-4

1) Plug in -7 as x and -18 as y:

-18=2(-7)-4

2) Multiply:

-18=-14-4

3) Subtract:

-18=-18

The answers are the same, therefore the correct answer to question 5 is equation D. Keep in mind, you want to check ever single pair of points to make sure it works for all of them, I'm just not going to list that as it would make this answer a lot longer for no reason.

Question 6:

We know that the cost for the boat is $25 as a base price, and also costs an additional $1.30 per day for fuel.

The correct equation is C=25+1.30d, because we are adding 1.3 every single day.

4 0

2 years ago

A regular decagon has 10 sides. How many reflectional symmetries does a regular decagon have?

lina2011 [118]

The rule for regular polygons are very easy. The number of reflectional symmetries is same as the number of sides. Regular polygons have all sides the same length and all angles same. Reflection symmetry means that you can fold the shape along that line and it will match up.

For this question, we want the number of reflectional symmetries of a regular decagon. Decagon is a 10 sided figure. Hence, the number of reflectional symmetries is 10.

There are 5 symmetry lines from one vertex to opposite vertex and 5 more symmetry lines form midpoint of one side to midpoint of opposite side.

ANSWER: 10

7 0

3 years ago

Read 2 more answers

P(red)=3/12

Kitty [74]

Answer:

E) 9/12

Step-by-step explanation:

well first you need to know the number of non-red objects. There are 12 total so 12-3=9 non-red objects

9 out of 12 are non-red which is the exact same as the number of chances you have. 9/12