Answer:−√33/7
Step-by-step explanation:
Second quadrant implies cos negative, as cos is projection from
unit circle to x axis.
sin^2+cos^2=1
cos= sqrt(1-sin^2)
sin^2 = 16/49
1-sin^2 = 33/49
sin= -sqrt(33)/7
Answer:
3 terms
4 4x and 9x
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