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2 years ago

Prove that:- sin 10° cos 75°sec 80° *cosec 15 = 1

1 answer:

3 0

Note: You will need to write the degree symbol for the arguments of these trigonometric functions.

As sin(x)=cos(90-x), this means sin10 = cos80 and cos75=15.

So,

LHS = (cos80)(sec80)(sin15)(cosec15)

LHS = (cos 80)(1/cos 80)(sin 15)(1/sin 15)

LHS = 1

Therefore, the identity is true.

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What is 7/8 as a decimal rounded to the nearest thousandth

harina [27]

Answer:

0.875

Step-by-step explanation:

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3 years ago

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Triangle EFG has vertices at E(2, 5), F(2, –1), and G(–3, –1). What is the perimeter of triangle EFG to the nearest tenth.

eimsori [14]

Answer:

18.8

Step-by-step explanation:

the distance between E and F is 6

the distance between F and G is 5

the distance between E and G is 7.8102

add them all together to get 18.8102

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3 years ago

Koda is solving 13 × 16. He used an area model to help work through each step. Which calculation did Koda make to get the highli

Anastasy [175]

Step-by-step explanation:

Since we have given that

Koda is solving

$13\times 16$

According to question, he used an area model to help work through each step.

So, it can be written as

$13=10+3\\\\16=10+6$

so, Let the length will be

$13=10+3$

Let the breadth will be

$16=10+6$

So, area will be

$l\times b\\\\=(10+3)\times (10+6)\\\\=10(10+6)+3(10+6)\\\\=10\times 10+10\times 6+3\times 10+3\times 6\\\\=100+60+30+18\\\\=208$

So,

13×16=208

3 0

4 years ago

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A right triangle has one angle that measures 80°. What is the measure of the other acute angle?

Tema [17]

Since a right triangle’s angle is 90 degrees, you subtract 80 from 90, which is 10 degrees.

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3 years ago

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Ok so i need help,what is 5% of 225

aivan3 [116]

If you would like to know what is 5% of 225, you can calculate this using the following steps:

x = 5% of 225
x = 5/100 * 225
x = 11.25

Result: 5% of 225 is 11.25.

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4 years ago

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Prove that:- sin 10° *cos 75°*sec 80° *cosec 15 = 1

Prove that:- sin 10° cos 75°sec 80° *cosec 15 = 1