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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