Question

What is the value of cos12in terms of roots

Answer 1

Answer:

Step-by-step explanation:

π

12 15 6–√+2–√4=12+3–√4−−−−−−−√=4+12−−√8−−−−−−−−√

2−3–√

75 5 π

12

cos2(15°)=[0;1,13, 1,12]

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