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3 years ago

Simplify the expression using the appropriate identities. (Do not use calculator)

Mathematics

1 answer:

bezimeni [28]3 years ago

6 0

Answer:

sin -1 degrees.

Step-by-step explanation:

sin (A - B) = sin A cos B - cos A sin B

Therefore sin 9° cos 10°- cos 9º sin 10° = sin (9 - 10)

= sin -1 degrees.

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(6+8)^2=6^2+8^2 statement true

ddd [48]

this is false

(6+8)^2= 196

6^2+8^2=100

They are not equal so this is a false statement

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4 years ago

#1 Find the slope given the points (3,-20) and (5,8) *

Artyom0805 [142]

Hey there :)

To find the slope with two points we will need to use the equation $\frac{y^2-y^1}{x^2-x^1}$

$x^1$ $x^2$ $y^1$ $y^2$

( 3 , -20 ) ( 5 , 8 )

Here is what the equation should look like when replaced with the numbers (it will be a fraction) :

$\frac{8 - (-20)}{5 - 3}$

We know that two negatives cancel out and make a positive, so the numerator would actually be 8 + 20.

Solve the fraction and we get $\frac{28}{2}$

28 divided by 2 is 14. The slope is 14.

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3 years ago

How do you find the lease common fatcor

8_murik_8 [283]

Answer:

One way to find the least common multiple of two numbers is to first list the prime factors of each number. Then multiply each factor the greatest number of times it occurs in either number. If the same factor occurs more than once in both numbers, you multiply the factor the greatest number of times it occurs.

Step-by-step explanation:

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4 years ago

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3 years ago

The length of the side of a regular nonagon is 7.86cm. Evaluate the perimeter of the nonagon.

Andru [333]

Answer: 70.74

Step-by-step explanation:

A Nonagon has 9 equal sides, and each side of the given is 7.86

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3 years ago