All categories

2 years ago

Evaluate sin(Arcos(-9/√145)).

Mathematics

2 answers:

tino4ka555 [31]2 years ago

8 0

Use the fact that $\sin x = \sqrt{1-\cos^2 x}$ to solve it.

$\sin(\arccos(-\frac{9}{\sqrt{145}}))=\sqrt{1-\cos^2(\arccos(-\frac{9}{\sqrt{145}}))} =\\= \sqrt{1-(-\frac{9}{\sqrt{145}})^2}=\frac{8}{\sqrt{145}}$

makkiz [27]2 years ago

7 0

Answer:

Step-by-step explanation:

You might be interested in

Dan divide a pie into eighths.how many equal parts are their

cluponka [151]

There are 8 equal parts. Each part is 1/8 of the whole 8/8

3 0

2 years ago

Read 2 more answers

If m∠DEF = 117°, find the value of x

ollegr [7]

Answer:

x = 7

Step-by-step explanation:

Given:

∠DEF = 117°

∠DEG = (12x + 1)°

∠GEF = (5x - 3)°

Find:

value of x

Computation:

∠DEF = ∠DEG + ∠GEF

117° = (12x + 1)° + (5x - 3)°

117° = 17 x - 2

x = 7

4 0

2 years ago

Write 12,430,090in expanded form

stira [4]

10,000,000+2,000,000+
400,000+30,000+90

7 0

2 years ago

What is the sum or difference?<br><br> 6x7 + 8x7

Agata [3.3K]

I think the answer is 98

7 0

2 years ago

Read 2 more answers

A savings account deposit of $300 is to earn 5.8% interest. After how many years will the investment be worth $900?

KatRina [158]

900=300(1+0.058)^t divide each side by 300
3=1.059^t
Log(3)=t*log(1.058)
T=log(3)/log(1.058)
T==19.5 years

7 0

2 years ago