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3 years ago

Solve this pleaseplease

Mathematics

1 answer:

tamaranim1 [39]3 years ago

6 0

Answer:

Step-by-step explanation:

cos(2a) = cos^2(a) - sin^2(a)

cos(2a) = 2cos^(a) - 1

cos(2a) = 11/25

11/25 = 2 cos^(a) - 1 Add 1 to both sides

1 + 11/25 = 2 cos^2

25/25 + 11/25 = 2 cos^2(a)

36/25 = 2 cos^2 (a) Divide by 2

36/50 = cos^2 (a) Take the square root of both sides.

6/5*sqrt(2) = cos(a)

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4 years ago

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Find thy slope of the line passing through the given point (2,0),(-6,8)

astraxan [27]

Answer:

slope = - 1

Step-by-step explanation:

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

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3 years ago

How to use associative property of multiplication with (1x5) x 1= 5

sp2606 [1]

<h3>By Associative property of multiplication,</h3>

$(1 \times 5) \times 1 = 5$

Solution:

Given expression is:

$(1 \times 5) \times 1 = 5$

We have to use the associative property of multiplication

Associative property of multiplication

When we are multiplying two or three numbers, it does not matter where we put the parenthesis, it results in same answer

$a \times (b \times c) = (a \times b) \times c$

Therefore,

$(1 \times 5) \times 1 = 1 \times (5 \times 1) = 1 \times 5 = 5\\\\(1 \times 5) \times 1 =5$

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3 years ago

What is 2/3 of 460? Just a little easy one for points

Vikentia [17]

Answer:

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3 years ago

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8/11 x (5/9 - 1/6) ÷ 1 5/9

Oksana_A [137]

Answer:

28/165

Step-by-step explanation:

You always use the order of operations, and the order of operations says to solve parentheses first, so you would solve 5/9 - 1/6, and get 7/18.

You would do exponents next, if there were any, but there is not, so you move on to the next operation(s).

The next operations are multiplication and division. From left to right, multiplication is first, so you solve 8/11 x 7/18 and get 28/99. Then, there is a division problem to solve. The problem is 28/99 ÷ 15/9. If you solve that correctly, you will get the answer 28/165.

The next step would be to simplify 28/165, but it cannot be simplified, so you are left with the answer 28/165.

4 0

3 years ago

Solve this pleaseplease​

Solve this pleaseplease