Solve the equation: cos x=-root of 2/2

yrealeq 2022-09-14 Answered
Solve the equation: cos x=-root of 2/2
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Answers (1)

lloviznennj
Answered 2022-09-15 Author has 12 answers
cos x = 2 / 2 ;
х = ± arccos ( 2 / 2 ) + 2 π k , k Z ;
x = ± ( π arccos ( 2 / 2 ) ) + 2 π k , k Z ;
x = ± ( π ( π / 4 ) ) + 2 π k , k Z ;
x = ± ( 3 π / 4 ) + 2 π k , k Z ;
Answer. ± ( 3 π / 4 ) + 2 π k , k Z .

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