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Trig Identities 14
Trig Identities Ch 14
Question | Answer |
---|---|
sin^2x*cos^2x | 1 |
tan^2x+1 | sec^2x |
cot^2x+1 | csc^2x |
sin(x+2PIn) | sinx |
csc(x+2PIn | cscx |
cos(x+2PIn) | cosx |
sec(x+2PIn) | secx |
tan(x+PIn) | tanx |
cot(x+PIn) | cotx |
sin(2x) | 2sinxcosx |
cos(2x) | cos^2x-sin^2x 2Cos^2x-1 1-2sin^2x |
tan(2x) | 2tanx/1-tan^2x |
sin^2x | 1/2(1-cos(2x)) |
cos^2x | 1/2(1+cos(2x)) |
tan^2x | 1-cos(2x)/1+cos(2x) |
sin(A+-B) | sinAcosB+-cosAsinB |
cos(A+-B) | cosAcosB-+sinAsinB |
tan(A+-B) | tanA+-tanB/1-+tanAtanB |
sin(Pi/2 -x) | cosx |
csc(Pi/2 -x) | secx |
tan(Pi/2 -x) | cotx |
cos(Pi/2 -x) | sinx |
sec(Pi/2 -x) | cscx |
cot(Pi/2 -x) | tanx |
sin x/2 | +-sqrt(1-cosx/2) |
cos x/2 | +-sqrt(1+cosx/2) |
tan x/2 | 1-cosx/sinx sinx/1+cosx |