2 years ago

What is this shusuwjdbxinsjzbxjsb

Mathematics

1 answer:

prisoha [69]2 years ago

4 0

Answer to 7 is alternate interior

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Question 16 (Essay Worth 7 points) Verify the identity. tan (x + π/2) = -cot x

Rus_ich [418]

Step-by-step explanation:

We know that tan=sin/cos, so tan(x+π/2)=

$\frac{sin(x+pi/2)}{cos(x+pi/2)}$

Then, we know that sin(u+v)=sin(u)cos(v)+cos(u)sin(v),

so our equation is then

$\frac{sin(x)cos(\pi/2)+cos(x)sin(\pi/2)}{cos(x+\pi/2)} = \frac{cos(x)}{cos(x+\pi/2) }$

Then, cos(u+v)=cos(u)cos(v)-sin(u)sin(v), so our expression is then

$\frac{cos(x)}{cos(x)cos(\pi/2)-sin(x)sin(\pi/2)} = \frac{cos(x)}{-sin(x)} = -cot(x)$

6 0

3 years ago

A clothing shop ordered 240 t-shirts. 20% of the shirts are Smalls. How

inessss [21]

Answer:

The answer is 48 small shirts ordered

Step-by-step explanation:

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3 years ago

Write a word phrase for and algebraic expression 3x+10

exis [7]

Three multiplied by a number plus ten.

8 0

3 years ago

If Fernando paid $450 for a netbook that was 75% of the original price, what was the original price?

Sav [38]

Answer:

$600

Step-by-step explanation:

75*100/450

7500/450

600

Thank me later :)

(Or just give brainliest)

4 0

3 years ago

Read 2 more answers

If the measure of angle a is 112 the measure of angle b is 112. True or false.

den301095 [7]

Answer:

False

Step-by-step explanation:

Angles a and b add to 180° (linear pair), so angle b is 68°.

7 0

2 years ago