Question

solve for x where 0<=x<360. your answer should be correct to teh nearest tenth of a degree
a.3cosx+9=7

Answer 1

We need to isolate x, first subtract 9 from both sides

3cos x = -2

what is next?

Answer 2

cosx=-2/3.
x=cosInverse(-2/3)
take calc and find out

Answer 3

no i got 131.8

Answer 4

your question says to put in degrees ok good lol

Answer 5

hey but the answer has two i.e 131.8 and 228.2

Answer 6

may i know how it is possible plz help

Answer 7

yes there will be two values because cos is negative in 2 nd and 3rd quadrant. so one answer is in 2nd Q and other in 3rd Q

Answer 8

Infact all trigonometric values will have two answers in 0 to 360 range. look at sine and cosine graphs

Answer 9

how to determine second value