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sinx
1/cscx
cscx
1/sinx
cosx
1/secx
secx
1/cosx
tanxx
1/cotx
tanx
sinx/cosx
cotxx
1/tanx
cotx
cosx/sinx
sin²0+cos²0
=1
1+tan²0
=sec²0
1+cot²0
csc²0
cos-1x/arcosx
√1-x²
son-1x/arcsinx
arccos/cos-1√1-x²
sin(a+b)
sina cosb +- cosa sinb
cos(a+b)
cosa cosb +- sina sinb
sin(20)
2sin0cos0
cos(20)=cos²0-sin²0
=1-2sin²0=2cos²0-1