Find the angle 0, in degrees, in the following equations, using the appropriate inverse trigonometric function

Question

a) cos0=0.49
b) tan0=1

Next question.
2. Find O.
a) cos0=2/5

Thanks for helping.

Answer 1

Your scientific calculator has a [2nd F] key or [2ND] key. This key is used to perform inverse trig functions. Make sure your calculator is in degree mode.
Here's the key sequence for (a) [.] [4] [9] [2nd F] [cos]
For the TI graphing calculator it would be like this: [2ND] [cos][.][4][9][enter]
a) cosθ = 0.49
θ = 60.659degrees

b)tanθ = 1
θ = 45degrees

2.)
a) cosθ = 2/5 = 0.4
θ = 66.4218degrees

Answer 2

it is going to in all danger be ninety ranges. look on the graph of the sine function from 0 ranges to ninety ranges. Now look on the graph of the cosine function from 0 ranges to ninety ranges. you would be huge conscious that over that constrained section (from 0 to ninety) they are reflect photos of yet another. If x is measured in ranges, then sin(x) = cos(ninety-x), and cos(x) = sin(ninety-x). continuously.