Question: how to solve this question? Express cos 50 in terms of powers of cos 9. Please show all relevant steps of working (this should take

how to solve this question?

Express cos 50 in terms of powers of cos 9. Please show all relevant steps of working (this should take you about 5 lines). For ease at typing, you may use the abbreviations c = 6036 and s = sin 9. Words: 0 A

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