Polar coordinates are given by (r,θ).
Rectangular coordinates are given by (x,y)=(rcos θ,rsin θ<span>)
You are given the r and the </span><span>θ.
You need to find </span> what <span>7cos<span>(<span><span>2π</span>3</span>)</span></span> is, then find <span>7sin<span>(<span><span>2π</span>3</span>).
</span></span>
<span>x=<span><span>−7/</span>2
</span>y=7</span><span>√</span>3/2
Answer:
coconuyts
Step-by-step explanation:
took the test
Answer: It can have infinite
Step-by-step explanation:
because numbers never finish
Answer:
x = - 9, x = 10
Step-by-step explanation:
Given
x² - x - 90 = 0
Consider the factors of the constant term (- 90) which sum to give the coefficient of the x- term (- 1)
The factors are - 10 and + 9, since
- 10 × 9 = - 90 and - 10 + 9 = - 1 , thus
(x - 10)(x + 9) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 10 = 0 ⇒ x = 10
x + 9 = 0 ⇒ x = - 9
lesser x = - 9
greater x = 10
