exam 1 identities calc 1

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Last updated 9:44 PM on 9/11/26

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1

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pythag trig identities

sin²x + cos²x=1

tan²x + 1=sec²x

cot²x + 1=csc²x

2

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double angle trig

sin2x= 2sinxcosx

cos2x=cos²x - sin²x=1

cos2x=2cos²x - 1

cos2x=1 - 2sin²x

3

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even/odd trig

sin(-x)= -sinx

cos(-x)= cosx

tan(-x)= -tanx

4

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lim_x→c c=

c

5

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lim_x→nxx=

n