The question on my quiz is “which expression has the value of 15 when the n=7 a.43-5n

b.3n-5

c.6n-28

d.19-28/n

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Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

What is 60.9643790503 to 5 decimal