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4 years ago

Brainliest to best answer!

2 answers:

8 0

Personally for proving questions especially trigo, i reckon u memorise all of the formulas, esp double angle and half angle.

also, for other types of proving qn like prove d = 1/2 in an a.p, u can always go back to your basics, which is U1 + d = U2.

but, i would say that as long as u practice a lot of questions u should be able to recognise how to prove the questions

zheka24 [161]4 years ago

7 0

Answer:

take your time and always ask for help when needed

Step-by-step explanation:

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Can someone please help me out

mestny [16]

I’m pretty sure it’s B

7 0

3 years ago

a triangle has sides 8cm and 5cm and an angle of 90 degree between them.calculate the smallest angle of the triangle

kakasveta [241]

Answer:

The smallest angle is 32 degrees

Step-by-step explanation:

The given parameters show that the triangle is a right angled triangle;

Let the two other angles be represented by x and y;

Since the angle between side 5 cm and side 8 cm is 90, we can represent any of this sides as the opposite and as the adjacent;

Scenario 1 (Calculating x)

Let opposite = 5 cm

Let adjacent = 8 cm

In trigonometry, The relationship between opposite and adjacent is Tangent;

$Tan\ x = \frac{Opposite}{Adjacent}$

$Tan\ x = \frac{5}{8}$

$Tan\ x = 0.625$

Take arctan of both sides

$x = tan^{-1}0.625$

$x = 32.0053832081$

$x = 32$ (Approximated)

Scenario 2 (Calculating y)

Let opposite = 8 cm

Let adjacent = 5 cm

In trigonometry, The relationship between opposite and adjacent is Tangent;

$Tan\ y = \frac{Opposite}{Adjacent}$

$Tan\ y = \frac{8}{5}$

$Tan\ y = 1.6$

Take arctan of both sides

$y = tan^{-1}1.6$

$y = 57.9946167919$

$y = 58$ (Approximated)

<em>By comparing the angles, the smallest angle is 32 degrees</em>

6 0

3 years ago

Carrie's Catering is having a special on their box lunches. The minimum purchase is 13 boxes for $91. Each additional box is $5.

sashaice [31]

There aren't any "following" equations, but I can give you one nonetheless.
y = 91 + 5x
This is because 91 is the minimum and y-intercept, x is each individual box, and the 5 is $5 per box.
Hope this helps!

6 0

3 years ago

Plz help me with this obviously i'm in school so i need the answer fast before the teacher sees me.

Katena32 [7]

Your answer is either C or D. But I strongly believe that the answer would possibly be C.

-Anime

4 0

4 years ago

Your company offers warranty coverage for MP3 players. The policy provides for the replacement of MP3 players that fail within 3

Finger [1]

Answer:

181 MP3 players

Step-by-step explanation:

Given data:

Replacement of MP3 that fail within 3 years

expected lifetime of MP3 = 5 years

number of MP3 players purchased = 1000

number of MP3 players replaced in the first year = ?

To determine the number of MP3 replaced in the first year we will employ this formula:

$E(To) = \frac{1}{u} = e_{x} ^{0} =\int\limits^a_0 {po} \, dt$

a = ∞

since the given problem is an exponential distribution

1/u = 5 hence u = 0.2

next we will determine the number of MP3's to fail in its first year of purchase

qo = failure

po = success

number of purchase = 1000

attached below is the remaining part of the solution

7 0

3 years ago