Arctan (- 1.714) is equal to how much? How to calculate the specific steps? Thank you for your help The design speed of a highway is 80km / h, on which there is a horizontal curve with radius r = 420m, and the length of transition curve is 70m. What is the offset coordinate of transition point? Who's going to help? Thank you

Arctan (- 1.714) is equal to how much? How to calculate the specific steps? Thank you for your help The design speed of a highway is 80km / h, on which there is a horizontal curve with radius r = 420m, and the length of transition curve is 70m. What is the offset coordinate of transition point? Who's going to help? Thank you

Arctan (- 1.714) = - arctan (1.714), and 1.714 is approximately equal to 3 under the root sign, so the original formula is equal to - 60 degrees

What is arctan 0 equal to? What is arctan 1 equal to? How can we get it?

arctan 0 = 0 //:tan 0 = 0,arctan 0 = 0
arctan 1 = π/4 //:tan (π/4) = 1 ,arctan 1 = π/4

Enko kk-105b calculator how to find inverse trigonometric function, please be a little more detailed,

Answer: at 18:26 on April 15, tan20 ° + 4sin20 ° = sin20 ° / cos20 ° + 4sin20 ° = (sin20 ° + 4sin20 ° cos20 °) / cos20 ° = (sin20 ° + 2sin40 °)