de D www.webassign.net/web/student/Assignment-Responses/submit?depa15306147 8. O
ID: 3025327 • Letter: D
Question
de D www.webassign.net/web/student/Assignment-Responses/submit?depa15306147 8. O -1 points SAlgTrig4 7.4.030. My Notes o Ask Y Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) 7 cos(6) 1 0 9. o -1 points SAgTrig4 7.4.031 Find all solutions of the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) rad Need Help?Explanation / Answer
Solution:(8)
7cos() + 1 = 0
7cos() = - 1
cos() = -1/7
() = arccos(-1/7)
() = ~ 1.714 + 2n radians ...where n is any whole number.
Solution:(9)
tan^2() - 1 = 0
tan^2() = 1
tan() = +/- 1
() = arctan(+/- 1)
() = +/- /4
Since the period of the function is , we can conclude that:
x = n ± /4 where n is the integer
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