X²+y²-2y=7
using the formula that links Cartesian to Polar coordinates
x=rcosθ and y=r sin θ
substituting into our expression we get:
(r cos θ)²+(r sin θ)²-2rsinθ=7
expanding the brackets we obtain:
r²cos²θ+r²sin²θ=7+2rsinθ
r²(cos²θ+sin²θ)=7+2rsinθ
using trigonometric identity:
cos²θ+sin²θ=1
thus
r²=2rsinθ+7
Answer: r²=2rsinθ+7
Answer:
40%
Step-by-step explanation:
amount of apples = 6
total amount of fruits = 15
percentage of apples
= 6/15 x 100%
= 40%
The Answer is A: 255.4 I took the test
Answer:
x = 29.15
Step-by-step explanation:
a^2 + b^2 = c^2
15^2 + 25^2 = 890
square root of 850 is 29.154759....
:)
Answer:
1 / (x+5)
Step-by-step explanation:
Factor the denominator
(x+1)/ (x+5)(x+1)
Cancel both (x+1)
=1/(x+5)
