Answered

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What are all the exact solutions of √2 cos x-1=0 for 0≤ x≤ 2π ?
a. π /4
b. π /4 and 7π /4
c. 3π /4 and 5π /4
d. π /4 · 3π /4 · 5π /4 , and 7π /4

Sagot :

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