Cos(θ - pi) = -cos θ ¿Cuál es el proceso? What´s the process? solo pude resolver esto, I could only solve this cos θ * cos pi + sen θ * sen pi cos θ * cos pi + cos (pi/2 - pi/1) * cos ( pi/2 - θ) cos θ * cos pi + cos ( -2pi/2) * cos (pi/2 - θ) cos θ * cos pi - cos pi * cos (90° - θ) cos θ * cos (90°- θ) cos θ * ( cos 90° - cos θ) cos θ * (0 - cos θ) cos θ * - cos θ -cos θ² = - cos θ no se en que me equivoque o que me falto I don´t know what I'm wrong

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step-by-step explanation:

hi i’m going tomorrow morning and i can come over and you out with this stuff for me haha ya day is going crazy and i’ll tell you what i’m talking about you don’t wanna go do you think i’m going to be a good friend i just don’t know how much you mean about the stuff you want to do and stuff you know i just want you and you know that i’m going crazy i don’t think i’m going crazy about going tomorrow and i’ll tell ya hey i don’t think i’m going crazy about going tomorrow and i’ll tell you what i’m done

i think you would have to divide the money he had saved, which is $2,000 by the time he plans on exercising which is 40 hours, and the answer you get should tell you the answer to your question.