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Strike441 [17]
3 years ago
14

If x = a sin teta and y = b cos teta

Mathematics
1 answer:
Marat540 [252]3 years ago
8 0
  • x= a sin theta
  • y=b sin theta

\\ \sf\longmapsto b^2x^2+a^2y^2

\\ \sf\longmapsto b^2(asin\Theta)^2+a^2(bcos\Theta)^2

\\ \sf\longmapsto b^2a^2sin^2\Theta+a^2b^2cos^2\Theta

\\ \sf\longmapsto a^2b^2(sin^2\Theta+cos^2Theta)

\\ \sf\longmapsto a^2+b^2(1)

\\ \sf\longmapsto a^2b^2

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Kenneth and Antonio are buying plants for the school garden. They want to buy 8 pepper plants for $2 each and 12 tomato plants f
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8 times 2 is 16 and 12 times 3 is 36. So 16 plus 36 is 52

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3 years ago
Solve by factorising x² + 11x + 30 = 0<br> dont get think one could someone explain this please.
nalin [4]

Answer:

x={-5,-6}

Step-by-step explanation:

x²+11x+30=0

x²+5x+6x+30=0 (as 5*6=30 and 5+6=11)

x(x+5)+6(x+5)=0

(x+5)(x+6)=0

so

x+5=0

x+6=0

therefore

x=-5

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4 0
3 years ago
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Richard’s store sells pineapples and grapefruits. Pineapples originally cost $5.15 apiece, and grapefruits originally cost $2.25
sveta [45]

Answer:

c. The price of grapefruits experienced a reduction 6.01 percentage points greater than the price of pineapples.

Step-by-step explanation:

The original price of Pineapples=$5.15

New price of Pineapples=$3.88

<u>Find change in price of Pineapples</u>

Change in price=original price- new price

=5.15-3.88=1.27

The price of Pineapple was reduced by $1.27

<u>% reduction in price</u>

(reduction value/original value) × 100

=\frac{1.27}{5.15} *100=24.66

=24.66%

The original price of grape fruits=$2.25

New price of grape fruits=$1.56

<u>Change in price of grape fruit</u>

Change in price= original price -new price

=2.25-1.56=0.69

<u>% reduction in price of grape fruits</u>

(reduction value/original value)×100

=\frac{0.69}{2.25} *100=30.67

=30.67%

<u>Answers</u>

The fruit that has its price reduced by a greater percentage is grape fruit

How many percentage points greater = 30.67%-24.66% = 6.01 points

5 0
3 years ago
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pychu [463]

Given:

L = W - 4

P = 2L + 2W

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So:

2W - 8 + 2W = P

P = 4W - 8

Answer is 4. 4W-8

5 0
4 years ago
PLLLLLEEEAAASSEE HELP!!Lifeguards counted the number of surfers in the water at two different locations, Sunset Beach and Sandy
tresset_1 [31]
<span>The two distributions upon the "ruler" scale clearly overlap at points 14 and 15. There is only an overlap for 2 points. Therefore the degree of overlap between the two distributions is "C" - low. What this means in practice is that the surfers at some points were in the same place or there was some overlap in times when surfers were present in the two locations. </span>
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4 years ago
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