10 сент. 2022 г. · Use a compass, protractor, and a ruler. If you want sin -1 (0.8), you use the compass to draw a circle of radius 1. Measure a height of 0.8 on the y-axis.

12 мая 2023 г. · To solve inverse trigonometric functions without a calculator, you need to use trigonometric identities and special triangles to simplify the expressions.

9 окт. 2014 г. · The answer to your problem is just -45 degrees. There's no easy way to do an inverse trig function without a calculator.

17 июн. 2023 г. · People calculated them all by hand then published the table of results in math and science texts. It's not a difficult task to do them by hand on your own.

9 дек. 2022 г. · Hi all. I understand very well how to solve for csc^-1(2) using a calculator. I know csc^-1 (2) can be rewritten as csc(theta) = 2.

19 нояб. 2021 г. · Know sin and cos of 0, 30, 45, 60 and 90 degrees. You then know asin and acos for those values too, we well as tan and atan (because tan is sin/cos).

17 сент. 2023 г. · Use SOHCAHTOA to make ratios of sides to find the possible values of the trig functions (i.e. 1/1 = tan45, while 1/√2 = √2/2 = sin45 = cos45).

14 нояб. 2015 г. · For arccos and arcsec, the angle is restricted between 0° and 180°. All other trig inverses are limited between -90° and 90°.

1 окт. 2017 г. · I actually know how to find arctan without a calculator: I draw a right triangle on the xy plane and see where the angle is located by referring to a trig unit ...

26 февр. 2023 г. · You actually do not need a calculator for those problems. u/EulerSupremacy mentioned that the arcsin function has a principal branch of -π/2 to ...