The equation 9cos(sin¯¹(x)) = √(81 – 81x²) is true since L.H.S = R.H.S
To answer the question, we need to know what an equation is
<h3>What is an equation?</h3>
An equation is a mathematical expression that show the relationship between two variables.
Given 9cos(sin¯¹(x)) = √(81 – 81x²), we need to show L.H.S = R.H.S
So, L.H.S = 9cos(sin¯¹(x))
= 9[√{1 - sin²(sin¯¹(x)}] (Since sin²y + cos²y = 1 ⇒ cosy = √[1 - sin²y])
9[√{1 - sin²(sin¯¹(x)}] = √9² × √{1 - sin²(sin¯¹(x)}]
= √[9² × {1 - sin²(sin¯¹(x)}]
= √[81 × {1 - sin²(sin¯¹(x)}]
= √[81 × {1 - x²}] (since sin²(sin¯¹(x) = [sin(sin¯¹(x)]² = x²)
= √(81 – 81x²)
= R.H.S
So, the equation 9cos(sin¯¹(x)) = √(81 – 81x²) is true since L.H.S = R.H.S
Learn more about equations here:
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Answer:
Carlos rode further than on Saturday by 107/56 miles.
Step-by-step explanation:
i did the quiz lol
You have to do $1,790 reduced (decreased) by $395 times 800 and your answer is $1166,000
Answer:
C. 26 yards
Step-by-step explanation:
Jamie's fence total length = perimeter of the polygon
Perimeter of the polygon = AB + BC + CD + DE + EF + FA
AB, FA and DE can be worked accordingly as shown below:
AB = |-5 - 0| = 5 units
FA = |5 - 2| = 3 units
DE = |1 -(-2)| = 3 units
BC, CD, and EF can be calculated using the formula 
Distance between B(0, 5) and C(4, 2):

Let,





Distance between C(4, 2) and D(1, -2)

Let,





Distance between E(-2, -2) and F(-5, 2):

Let,





Total length of the wall in yards = 5 + 5 + 5 + 3 + 5 + 3 = 26 yards