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MA_775_DIABLO [31]
4 years ago
5

I need help on this homework because I'm so stuck on this can you please help me

Mathematics
1 answer:
Svetlanka [38]4 years ago
7 0
I answered ALL your 15 problems. Sorry, I took long.
Please mark me brainliest if this helped you. That will help me a lot ...

I hope it helps! 

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Sin(θ) = − <br><br> 9<br><br> 41<br><br> where <br><br> 3π<br><br> 2<br><br> &lt; θ &lt; 2π
d1i1m1o1n [39]


sin theta = -9/41, where theta is in Q IV; find the angle theta:

Here the opp side is -9, the hyp. is 41.  The adj side is found by applying the Pyth. Thm.:

(-9)^2 + x^2 = 41^2

81      + x^2  = 1681.  Then x^2 = 1600, and the adj. side (x) is +40.  We know it's +40 because theta is in Q IV.

The angle theta is  arcsin (-9/41).  Using a calculator, 

arcsin (-9/41) = -0.22 radians (which is correct because theta is in Q IV, just as -0.22 rad is in Q IV.    You could express theta as a positive angle by subtracting 0.22 rad from 2pi rad:  1.78 rad.  You could, of course, change these angles in radians into angles in degrees.

8 0
3 years ago
If cos theta is -5/13 and sin θ &lt; 0, what is tan θ ?
tensa zangetsu [6.8K]
Take the right angled triangle  with sides 13, 12 and 5. sine theta will be 12/13

When sin theta < 0 and cos theta < 0  we are in the  third  quadrant  so sin theta will be -12/13

tan theta = sin theta / cos theta  = -5/13 /  -12/13   = -5*13 / -12*13 =  5/12
 
7 0
3 years ago
How to do this question plz explain me step by step plzz​
ra1l [238]
Answer

148cm^2

Explanation

A cuboid has equal width and length as it’s base is a square. So w or l = root 30

Since the volume of a cuboid is

Length • width • height

And we know length and width when multiplied are 30

30 • height = 120

Therefore height = 4

Now for surface area it’s

2 • h • l + 2 • h • w + 2 • l • w

2 • 4 • root 30 + 2 • 4 • root30 + 2 • 30 = 60 + 16root30 = 148~cm^2
8 0
3 years ago
Find the width of a rectangle with a perimeter of 90 and a length of 15.
Setler79 [48]

Answer:

The width is 75.

Step-by-step explanation:

Since we already know that perimeter = width + length, then all we needed to do was subtract the length (15) from the perimeter (90) to get the width (75)!

Hope this helped!

7 0
3 years ago
Read 2 more answers
Select the procedure that can be used to show the converse of the Pythagorean theorem using side lengths chosen from 3 feet, 4 f
aksik [14]

Using Pythagoras theorem,  we know that 3² + 4² = 5², draw the 3-foot side and the 4-foot side with a right angle between them. The 5-foot side will fit to form a right triangle

<h3>How to use Pythagoras theorem to prove a right triangle?</h3>

The Pythagoras theorem states that the sum of two squares equals the squared of the longest side.

Therefore,

c²= a²+ b²

where

  • c = hypotenuse side
  • a and b are the other legs.

Therefore,

3² + 4² = 5²

Hence,

Knowing that 3² + 4² = 5², draw the 3-foot side and the 4-foot side with a right angle between them. The 5-foot side will fit to form a right triangle

learn more on Pythagoras's theorem here: brainly.com/question/20462170

#SPJ1

4 0
2 years ago
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