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3 years ago

Cos (x) = -0.6. if x and y are complementary, what is sin (y)?

Mathematics

1 answer:

hichkok12 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

cos(x) = -.6 means that you are looking for the angle, x, that has a cosine of -.6. If you do this on your calculator, you press the 2nd button, then cos (in degree mode, NOT radian mode!) and then -.6 and enter. You get an angle measure of 53.13010235°. If that angle is complementary to angle y, then angle x and y added together have to equal 90°. Therefore,

90 - 53.13010235 = 36.86989765°

Take the sin of this angle by hitting sin and then entering in the 36.86989765. This gives you a value of .6000000000001 which, for all intents and purposes, is .6

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pishuonlain [190]

Divide 27 by 60, then multiply by 100:

27 /60 = 0.45

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3 years ago

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3 years ago

A man can buy 20 mangoes or 30 oranges. If he wants a each amount of each, how many of each would he get? Write an EQUATION to s

DochEvi [55]

Answer:

Step-by-step explanation:

In this question, there are two variables: the number of mangoes(y) bought and the number of oranges bought(x).

Let's say the man have z money, mangoes price is $\frac{1}{20}$ z and the oranges price is $\frac{1}{30}$ z. The equation for money and number of mangoes and oranges will be:

money = mango price * mangoes bought + orange price * orange bought

z= $\frac{1}{20}$ z * x + $\frac{1}{30}$ z *y

1= $\frac{1}{20}$ x + $\frac{1}{30}$ y

- $\frac{1}{30}$ y= $\frac{1}{20}$ x -1

y= -1.5x + 30

y= 30 - 1.5x

If he want equal number of mango and orange, that mean y=x. The calculation will be:

y= 30 - 1.5x

x= 30 - 1.5x

x+ 1.5x = 30

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4 years ago

PLEASE HELP WILL GIVE BRAINLIEST

seropon [69]

Answer:

-6(3x +2) = 2x -5 -20x -7 (use the distributive property )

-18x -12 = -18x - 12 (i combined like terms on the right side of the equation)

at this point I can tell that it's true for any value of x, so they all apply

Step-by-step explanation:

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3 years ago

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