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RUDIKE [14]
3 years ago
8

Prove that cosA.tanA = sinA​

Mathematics
1 answer:
liubo4ka [24]3 years ago
4 0

Step-by-step explanation:

\cos(A) . \tan(A)  =  \cos(A) . \frac{ \sin(A) }{ \cos(A) }  \\  =  \sin(A)  \:  \: hence \: proved

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Lottie buys a pack of 50 cans of lemonade.
malfutka [58]

Answer:

£15.7

Step-by-step explanation:

32 cans x 50P = 1600p

1600p to Pounds = £26.66 (1600 divided by 60)

Remaining cans = 18 (50 - 32)

18 cans x 20p = 360p

360p to Pounds = £6 (360 divided by 60)

£26.66 + £6 = £32.66

£32.66 (Profit) - £17 (Cost of cans) = £15.66

15.66 to 3SF = 15.7

3 0
2 years ago
Read 2 more answers
Write an equation of the line that is perpendicular to the line y = 1 2 x + 8 that passes through the point (4,6).
Harlamova29_29 [7]
B. 

This is because perpendicular lines have opposite and flipped slopes. 
4 0
3 years ago
Which polygon has the most sides? pentagon nonagon hexagon octagon
spin [16.1K]

Answer:

nonagon - 9

Step-by-step explanation:

  • pentagon - 5
  • nonagon - 9
  • hexagon - 6
  • octagon - 8
6 0
3 years ago
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Find a polynomial f(x) of degree 4 that has the following zeros. 7, −3, 0, −2
HACTEHA [7]

Answer:

x^4 - 2x^3 - 29x^2 - 42x

Step-by-step explanation:

Equal all the zeros to x then move them over.

x=7,x=-3,x=0,x=-2

x-7,x+3,x+0,x+2

Then multiply each factor

(x-7)(x+3)(x)(x+2)

x^4 - 2x^3 - 29x^2 - 42x

7 0
3 years ago
Solve for W<br><br> 14/W=26/39
ozzi

Answer:

I think the answer is 21

Step-by-step explanation:

The answer is 21 because we can simple reduce 26/39 = 2/3. And now that you have done that all we need to do is find what 14/w = 2/3 this is quite simple as we just have to mutiply the 3*7 to get 21 as your answer. I don't know if this is correct or not but this is my best answer.

5 0
3 years ago
Read 2 more answers
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