Ok so I am having difficulty doing significant digits for longer operations (i.e. cosine law) where you also have square roots and squares (I know they are simply multiplications)
c^2 = a^2 + b^2 - 2ab(cosC)
The Attempt at a Solution
Here are some example numbers. Please let me know if the answer is in correct significant digits.
c^2 = 22^2 + 65^2 - 2(22)(65)(cos119degrees) , c greater than or equal to 0
I think for cosine law what is really confusing me is how the cos119 converts into a very long decimal (weird fraction results)
And what about for sine law?
sin 119 degrees / 78.08 = sin theta / 65
theta = 47 degrees
Are the significant digits for both answers correct? Please help!