When solving something like , you find the solutions saying that . You're in this situation here, except that and that 100 has been replaced by 0.64 :
It gives you two equations to solve, good luck !
Its revision time, and I've been going through previous papers for the module. One cropped up asking for an angle, given . I know how I'd go about it if it was simply sin... but i just dont know the inverse of !!
None of my coursemates know either, but I cant ignore it and hope it doesnt come up really!
Any help on the matter would be appreciated!