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If cos 25°=K , determine cos50°​
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If cos 25°=K , determine cos50°​

User Acpmasquerade
by
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1 Answer

6 votes

Answer:

cos 50⁰ = cos 2.25⁰ = 2cos²25⁰ - 1 = 2K² - 1

User Petrunov
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