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3 years ago

Is sin A is 7/10 what is Cos A

Mathematics

1 answer:

viva [34]3 years ago

5 0

Answer:

Cos A = (√51)/ 10

Step-by-step explanation:

sin is opposite/hypothenuse

cos is adjacent/hypothenuse

Pythagorus theorem says that c² = a² + b²

10² = 7² + b²

b² = 100 - 49

b = ±√51

It doesn't make sense for a length to be a minus number therefore, we will use +√51.

Cos A = (√51)/ 10

Tell me if I am wrong.

Can I get brainliest

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Need answered as fast as possible!

Tems11 [23]

Answer is : 2^(7/6) x^(5/3) y^(1/6)

See attachment file below.
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3 0

3 years ago

Work out the area of the trapezium.

Zanzabum

Answer:

58.29 cm²

Step-by-step explanation:

The area (A) of a trapezium is calculated as

A = $\frac{1}{2}$ h (a + b) , substitute given values into formula

A = $\frac{1}{2}$ × 6.7 × (7 + 10.4)

= 3.35 × 17.4

= 58.29 cm²

8 0

3 years ago

Solve 2x+y=7 for y what is y ?

masha68 [24]

You cant solve y but you can form an equation in terms of y
which is y=7-2x

if you were given another equation that has the term y and x than you can solve it.also that is a simultaneous equation.

Hope this helps,dont forget to put this as the brainliest answer if it does to help me out too. xD

6 0

3 years ago

Read 2 more answers

The shortest board available at the lumber yard is 3 feet long. How many 4 inch lengths can a carpenter get from the available b

MrRissso [65]

Answer:

Total of 9 lengths of 4 inches can be taken out from a board of 3 feet

Step-by-step explanation:

length of board in feet = 3 ft

1 ft = 12 inches

Length of board in inch = $3\times 12$

= 36 inches

Let no of 4 inches length be = x

The equation become

$x \times 4= 36\\x= \frac{36}{4} \\x= 9$

Total of 9 lengths of 4 inches can be taken out from a board of 3 feet

5 0

3 years ago

In a fish tank, there are 3 orange fish, 5 blue fish and 6 yellow fish. In simplest form, what is the ratio of yellow

Lemur [1.5K]

Answer:

B. 2:1, for every two yellow fish there is one orange fish

Step-by-step explanation:

So you have 6 yellow fish and 3 orange fish.

You can divide both these values by 3 to get:

2 yellow fish: 1 orange fish

Therefore, the simplified version of the ratio is 2:1

In context this means for every 2 yellow fish there is 1 orange fish.

The answer is then B.

<em>I hope this helps!!</em>

5 0

3 years ago