Please help if you can 30 points

Mathematics

1 answer:

9966 [12]2 years ago

4 0

Y = sec(x) has a range that doesn’t include 0.

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Is this a parallelogram? Just checking

natka813 [3]

Answer:

Step-by-step explanation:

Yes it’s parallel because the lines do not meet

8 0

3 years ago

After 8 hours of snow, the

Dmitrij [34]

Answer: -21.125 or -21 1/8 degrees

Explanation: Divide the number of degrees (-169) by the amount of time it was snowing (8) to get the answer (-21.125).

-169÷8=-21.125

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3 years ago

Which expression is equivalent to (x^1/2y^16)^1/2

Irina-Kira [14]

Xy^16 / 4

I don't really know how to explain it, but this is the answer

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3 years ago

Which values are outliers ?

Minchanka [31]

5.8 0.8 5.9 6.1 and 10.9 are all correct answers.

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4 0

3 years ago

Read 2 more answers

Prove that sin20sin40sin60sin80=3/16

never [62]

We'll use the following properties of sine and cosine to prove this:

$sin(a)\cdot sin(b) = \frac12(cos(a-b) - cos(a+b))$

$cos(a)\cdot cos(b) = \frac12(cos(a+b) + cos(a-b))$

$cos(180+a) = cos(180-a)$

Then it's just a matter of filling it in...

sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =

1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =

1/8(1 - cos160 - cos120 + cos200) =

1/8(1 - cos160 - cos120 + cos160) =

1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16

5 0

3 years ago