Question

prove : 1+3cos alpha -4cos^3 alpha/1-cos alpha= (1+2cos alpha)^2

plz plz right answer I will mark as brainleist​

Answer 1

Step-by-step explanation:

Iron atoms loses two electrons and carries two positive charges and it is called ferrous ion and it is bivalent i.e., Fe+2.

Answer 2

Step-by-step explanation:

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Refer to the above attachment ⬆️⬆️.