Let a < B < 0, a & # 178; + B & # 178; = 4AB, then the value of A-B / A + B is? Oh, the wrong number is a + B / a-b

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• 1. (a + b) (a + 3b) = A & # 178; + 4AB + 3B & # 178;
• 2. Math problem X-1 / x = 3 x & # 178; + 1 / X & # 178; =? x-1/x=3 x²+1/x²=? Why does x + 1 / x = 3 x & # 178; + 1 / X & # 178; = 7 not understand (x + 1 / x) &# 178; should get 9
• 3. A math problem 5x + 2.5x = 15
• 4. When is 150 minutes
• 5. 7 tons 62 kg equals several tons 90 tons 60 kg equals several tons
• 6. It takes 23:56 minutes for the earth to rotate 360 times a week, which is called a stellar day What's wrong with this sentence
• 7. How much is 0.5 times 1
• 8. How many weeks, how many days, how many hours, how many minutes, how many seconds are there in a year
• 9. Exactly how far is a light year? What's the speed of light?
• 10. Degrees, minutes and seconds are 10.26 degrees in degrees, minutes and seconds 10.26 ° in degrees, minutes and seconds 108.25 ° in degrees, minutes and seconds The cost represents 32 ° 7'12 ″ The cost is 2430 ″ Calculate 30 ° 29 ′ 21 ″ + 15 ° 40 ′ 42 ″ 180°-32°45′13″ 25°36′12″*4 109°24′/6
• 11. What formula is used for a & # 178; BC + B & # 178; AC + C & # 178; ab =?
• 12. TaNx = 4, what is x equal to
• 13. What is (1-tanx) × TaNx equal to
• 14. What does TaNx multiply by equal to 1? Is it cosine or cotangent? (TaNx) * (?) = 1 and ∫ tanxdx =?
• 15. If cos (π + x) = 3 / 5, X ∈ (π, 2 π), then TaNx is equal to I want the process! Why cos (π + x) = 3 / 5, that is - cos x = 3 / 5? How to use x ∈ (π, 2 π)?
• 16. Given TaNx = 3, find the value of sinxcosx
• 17. If f (x) = TaNx (1-cos ^ 2) + sinxcosx, then the value of F (7 π / 6) is? 3Q
• 18. Solve the equation 2cot (x) = 1 + Tan (x) at 0
• 19. The curve T1: y = Tan (Wx) (W > 0) is translated 6 / 6 along the x-axis to the right to obtain the curve T2. If all the symmetry centers of the curve T1 coincide with all the symmetry centers of the curve T2, then the minimum value of W is
• 20. Equation 5: x = 7: 3,