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Find the length of the curve over the given interval.
polar equation
r = 4a cos(θ) interval
-pi/2 <= theta <= pi/2? Need to find a and b such that x^4 - 8x^3 + 4x^2 + ax + b is a perfect square.? 4cosα((sin(α+β)cosβ - cos(α+β)sinα)
Can someone help? I'm 21 years-old Vietnamese man, my actual height is 5'9 7/8" (177.6 cm). Should I round up my height to 5"10" (177.8 cm)? Can blood typing be performed using only the serum portion of the blood?