Rewrite 2sin2x + 3 cos x − 3 in terms of cos x

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  -2cos²(x) +3cos(x) -1

Step-by-step explanation:

Use the "Pythagorean identity" to replace sin²(x).

  sin²(x) +cos²(x) = 1

Then ...

  2sin²(x) +3cos(x) -3 = 2(1 -cos²(x)) +3cos(x) -3

  = -2cos²(x) +3cos(x) -1

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

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w'x is 0.

hope it