Question

sec2 22-cot2 68=1 please click a pic of page on which solution is done as to make it more clear plzzzzz​ answer it quickly as my online test is going on plz hurry up mates​

Answer 1

iron ore is the most widely distributed element of the earth crust, rarely occurs in free state.it enters into the composition of many rocks and minerals expressively from igneous and metamorphic rocks.