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k0ka [10]
3 years ago
7

Cos(3pi/4)= HELLPPPP

Mathematics
1 answer:
Kitty [74]3 years ago
5 0
3π/4 angle is in the second quadrant, so cos (3π/4) is going to be negative.

Reference angle of 3π/4 is (π - 3π/4) = π/4

cos(π/4) = √2/2

cos (3π/4) = - √2/2

Answer is C.
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Solve for v: -v+1=1 + 8v
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Answer: v=0

Step-by-step explanation:

Because....

Step 1: Simplify both sides of the equation.

−v+ 1= 8v + 1

Step 2: Subtract 8v from both sides.

−v+1 − 8v = 8v+1 − 8v

−9v + 1 = 1

Step 3: Subtract 1 from both sides.

−9v + 1 −1 = 1−1

−9v=0

Step 4: Divide both sides by -9.

\frac{-9v}{-9} = \frac{0}{-9}

v=0

Therefor, the answer is v = 0

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With Obesity on the rise, a Doctor wants to see if there is a linear relationship between the Age and Weight and estimating a pe
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Answer:

112.569 ( D )

Step-by-step explanation:

Applying the estimated Regression Equation

y = b1X1 + b2X2 + a

b1 = ((SPX1Y)*(SSX2)-(SPX1X2)*(SPX2Y)) / ((SSX1)*(SSX2)-(SPX1X2)*(SPX1X2)) = 596494.5/635355.88 = 0.93884

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y = 0.939X1 + 0.309X2 + 31.733

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y = (0.93884*39) + (0.30925*143) + 31.73252= 112.569

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attached is the Tabular calculation of the required values needed for estimated regression equation

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