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Crazy boy [7]
3 years ago
15

PLZ PLZ PLZ HELPP I WILL MAKE U BRAINLIEST

Mathematics
1 answer:
bekas [8.4K]3 years ago
7 0

Answer: huh ?

Step-by-step explanation:

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Given tan θ = 2 and sin θ < 0. Find cos(θ +pi/4)
Lera25 [3.4K]

Answer:

√10 / 10

Step-by-step explanation:

tan θ > 0 and sin θ < 0, so θ is in quadrant III.  That means cos θ < 0.

cos(θ + π/4)

Use angle sum formula.

cos θ cos(π/4) − sin θ sin(π/4)

½√2 cos θ − ½√2 sin θ

Factor.

½√2 cos θ (1 − tan θ)

½√2 cos θ (1 − 2)

-½√2 cos θ

Write in terms of secant.

-½√2 / sec θ

Use Pythagorean identity (remember that cos θ < 0).

-½√2 / -√(1 + tan²θ)

-½√2 / -√(1 + 2²)

½√2 / √5

√10 / 10

5 0
3 years ago
How to factor x^2+8x+12
Setler [38]
<span> x^2+8x+12 = </span>(x + 6)(x + 2)

5 0
3 years ago
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Cans of corn are on sale at 10 for $4. Find the cost of 15 cans?
SpyIntel [72]
10/15 = 4/x
10x=60
x=6
8 0
3 years ago
What formula do i use when it tells me to find the area with a given circumference? If you know please give an example as well,
liberstina [14]

Answer:

Step-by-step explanation:

A = C^2 / 4 x pi

so if the circumfernce was 10 you would square it to make it 100 and then you would do 4 x pi to get 12.57 ( rounded).

you would then just divide 100 by 12.57 = 7.96 ( rounded)

hope it helped

6 0
3 years ago
five hotdogs cost $1.80.Each hotdog cost the same amount.What is the cost per hotdog in dollars and cents
earnstyle [38]

Answer:

$0.36

Step-by-step explanation:

3 0
3 years ago
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