![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Let a = 1 + tan10 / 1-tan10, B = tan10 + tan50 + √ 3tan10 * tan50, Find the size relation of a, B, a + B / 2, Is (a + b) / 2
A = tan45 + tan10 / 1-tan10tan45 = tan55, B = tan60 (1-tan10tan50) + √ 3tan10 * tan50 = tan60, a ^ 2 + B ^ 2 / 2 > = a * b = tan55 * tan60 > tan45 * tan60 = tan60, so the relationship between them is a
What is Tan 3 π / 4
tan3π/4=tan(π-π/4)=-tan(π/4)=-1
What does tan3 α equal
tan3α=tan(α+2α)=(tanα+tan2α)/(1-tanαtan2α)=(tanα+2tanα/（1-tanαtanα）)/(1-tanα2tanα/（1-tanαtanα）
RELATED INFORMATIONS
- 1. How many degrees is Tan 3 / 4?
- 2. Let cos31 ° = α, then sin39 ° + tan149 °=
- 3. If cos 31 ° is known to be m, then sin 239 ° Tan 149 ° is given=______ (expressed by an equation with m)
- 4. What is the arc degree of the circle angle whose arc length is equal to radius? Such as the title
- 5. If the three sides of △ ABC are three consecutive positive integers, and a > b > C, 3b = 20acos & nbsp; a, then Sin & nbsp; a: Sin & nbsp; B: Sin & nbsp; C=______ ．
- 6. Mathematical simplification Evaluation M + 6 / m ^ 2-m-2 △ 3 / M + 2 times (1-1 / M + 2)
- 7. (3a-2b) ^ 2 - (3a + b) (3a-b) = (a-3b), known 9 ^ 2 = a ^ 4,4 ^ 2 + 2 ^ B, simplified evaluation There are two answers, quick Add (2a + b) at the end
- 8. If the result of (a + m) (a + 12) does not contain the linear term of a, then the value of M is () A. 2B. -2C. 12D. -12
- 9. How to calculate the multiplication and division method with letters? For example, 2 m times 2 m, 2 / 3 m times 3 m, 1 / 3 m divided by 2 m
- 10. Write out all the quartic monomials whose coefficients are half and contain the letters X and m without other letters I said one just now, but I didn't have three. I cheated my five points
- 11. The value of tan10 ° + tan50 ° + 3tan10 ° tan50 ° is () A. -3B. 3C. 3D. 33
- 12. If sina40 ° is known to be a, then cos130 ° is equal to a
- 13. If cos130 = a, tan50 If cos130 = a, tan50=
- 14. It is known that ∠ A is an acute angle, and if Sina = cos30 °, then Tana=
- 15. Find Sin & sup2; 1 ° + Sin & sup2; 2 ° + Sin & sup2; 3 ° sin²89°=?
- 16. It is proved that: (sin20 ° - √ (1-sin178; 20 °) / √ (1-2sin20 ° cos20 °) = - 1
- 17. What is the trigonometric function of sin 7 degrees 7 minutes 30 seconds?
- 18. Algebraic problems... Using the direct flattening method to solve equations Using direct flattening method to solve equation (1)2(x+a)^2÷3=8 (2)2(4-x)^2÷3=6 Requirements process The first wrong number should be 4
- 19. Junior high school algebra to prove the problem, the use of the ratio of proportion in the theorem Ask the teachers and students of junior high school for a proof of junior high school algebra, It is known that a = B + C + 1; d = e + F + 1; g = H + I + 1; Proof: (D-A) / (D-G) = (E-B) / (E-H) = (F-C) / (f-I) Should be the use of proportion in the split ratio theorem After so many years of reading, I finally forgot all my junior high school mathematics, The recommended answers are: Let Ka = IB + JC + 1 a=b+c+1->k1A=i1B+j1C+1 d=e+f+1->k2A=i2B+j2C+1 G = H + I + 1 - > K3A = i3b + j3c + 1 Substituting (D-A) / (D-G) = (k2-k1) a / (k2-k3) a = (k2-k1) / (k2-k3) Similarly, (E-B) / (E-H) = (F-C) / (f-I) = (k2-k1) / (k2-k3) It has been proved But there are some questions: (E-B) / (E-H) should not be equal to (i2-i1) / (i2-i3), how can it be equal to (k2-k1) / (k2-k3)?
- 20. Sin30^2+cos60^2+sin30cos60=3/4 Sin20^2+cos50^2+sin20cos50=3/4 Sin15^2+cos45^2+sin15cos45=3/4 Analyze the common characteristics of the above formulas, write the equation that can reflect the general law, and prove it