The radius of a circle with area A is approximately $\sqrt{\frac{A}{3}}$ . The area of a circular mouse pad is 45 square inches.
1 answer:
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Answer:
-¹²/₅
Step-by-step explanation:
Let cos a = -⁵/₁₃
Then tan a = sin a/cos a
= [√(1 - cos²a)]/cos a
= {√[1 - (-⁵/₁₃)²]}/(-⁵/₁₃)
= -[√(1 - ²⁵/₁₆₉)] × ¹³/₅
= -[(√(¹⁴⁴/₁₆₉ )] × ¹³/₅
= -¹²/₁₃ × ¹³/₅
= -¹²/₅
tan(arccos (-⁵/₁₃)) = -¹²/₅
The diagram shows the 2nd quadrant of a circle with radius 13, cos a = -⁵/₁₃, and tan a = ¹²/₍₋₅₎ = -¹²/₅.
Answer:
C.
Step-by-step explanation:
We have been given a diagram of an oblique prism and we are asked to choose the expression that represents the volume of the prism.
Since we know that an oblique prism is a prism in which the bases are parallel, but the faces are not directly one over the other.
The volume of an oblique prism is base area multiplied by the height.
We can see from our diagram that our prism has an square base as each side of base equals x units.
We can also see from our given diagram that it has a height of (x-2) units and slant height of (x+1) units.
Since volume of oblique prism is base area times by the height (not slant height). So upon substituting the height and base area of our given prism in volume formula we will get,
Therefore, the volume of our given prism is and option C is the correct choice.