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3 years ago

14

Please answer if you know !! i really need help on this one :(

1 answer:

Temka [501]3 years ago

8 0

Since we know that the measure of angle 3 is 72 we now also know that angle 2 equals 72 because they are congruent. So 72 + 72 = 144. 180 - 144 = 36. Meaning angle 1 equals 36 degrees.

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How to solve this :') please help

blsea [12.9K]

Answer:

3/2

Step-by-step explanation:

sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

$\sin(\frac{3\pi}{4}-\beta)=\sin(\frac{3\pi}{4})\cos\beta-\cos\frac{3\pi}{4}\sin\beta\\=\frac{1}{\sqrt{2}}\cos\beta-(-\frac{1}{\sqrt{2}})\sin\beta\\\\=\frac{1}{\sqrt{2}}(\cos\beta +\sin\beta)\\\\\sin^2(\frac{3\pi}{4}-\beta)=\frac{1}{2}\cos\beta +\sin\beta)^2=\frac{1}{2}(\cos^2\beta +\sin^2\beta+2\sin\beta\cos\beta\\=\frac{1}{2}(1+\sin2\beta)=\frac{1}{2}(1-\frac{1}{5}) = \frac{2}{5}\\$

Use $\cot^2x=\csc^2x-1=\frac{1}{\sin^2x}-1$

so

$\cot^2(\frac{3\pi}{4}-\beta)=\frac{1}{\sin^2(\frac{3\pi}{4}-\beta)}-1 = \frac{1}{\frac{2}{5}}-1=\frac{5}{2}-1=\frac{3}{2}$

7 0

2 years ago

Please answer correctly !!!!! Will mark brainliest !!!!!!!!!!!

vesna_86 [32]

Answer:

your answers are already matched up

Step-by-step explanation:

8 0

4 years ago

A sledgehammer weighs 18 pounds on Earth and 4 pounds on the planet Namar.

Advocard [28]

It would weight 18lbs i believe

8 0

3 years ago

Read 2 more answers

Nick paid 2.94 in sales tax on an item that cost $42.00 at the rate how much he pay in sales tax on an item that cost $58.00 bef

ruslelena [56]

$2.93/$42= about 7% tax
$58*7%= $<span>4.06 in tax</span>

4 0

4 years ago

cartons of juice boes come in packages of 3. ms ford has 2 juices left for school lunches. if ms ford buys 5 packages of juice b

Andrews [41]

Well 1 package=3, so if she buys 5 packages it's 5*3=15. She still has 2 left so you take 15+2=17. She will have 17 juice boxes in total.

6 0

3 years ago