Can someone help me solve this problem?

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1 Answer
Jim G.
Mar 13, 2018

#7.8(tan23^@)" is invalid"#

Explanation:

#"Check each ratio"#

#(1)#

#cos67^@="adj"/"hyp"=(BC)/7.8#

#rArrBC=7.8(cos67^@)larr" Valid"#

#(2)#

#sin23^@="opp"/"hyp"=(BC)/7.8#

#rArrBC=7.8(sin23^@)larr" Valid"#

#(3)#

#tan67^@="opp"/"adj"=7.2/(BC)#

#rArrBC=7.2/(tan67^@)larr" Valid"#

#(4)#

#tan23^@="opp"/"adj"=(BC)/7.2#

#rArrBC=7.2(tan23^@)larr" Valid"#

#rArrBC=7.8(tan23^@)larr" Invalid"#

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