Pythagorean identities identity tan(- x)= - tanx csc(pi/2 - X) = secX tan(pi/2 - X) = cotX sec(pi/2 - X) = cscX cot(- x)= - cotx conjugate sec(x)= 1/cos(x) 1 + cot2(t) = csc2(t) Quotient identity csc(- x)= - cscx sec(- x)= secx tan(x)= cot(x) 1 = cos(x) sin(x) cos(pi/2 - X) = sinX cot(pi/2 - X) = tanX sin(x)= 1/csc(x) sin(- x)=- sinx tan2(t) + 1 = sec2(t) sin2(t) + cos2(t) = 1 confuntion cos(- x)=cosx trigonometric identities reciprocal identity odd- even identity common denominator cos(x)= 1/sec(x) sin(pi/2 - X) = cosX trigonometric expressions Pythagorean identities identity tan(- x)= - tanx csc(pi/2 - X) = secX tan(pi/2 - X) = cotX sec(pi/2 - X) = cscX cot(- x)= - cotx conjugate sec(x)= 1/cos(x) 1 + cot2(t) = csc2(t) Quotient identity csc(- x)= - cscx sec(- x)= secx tan(x)= cot(x) 1 = cos(x) sin(x) cos(pi/2 - X) = sinX cot(pi/2 - X) = tanX sin(x)= 1/csc(x) sin(- x)=- sinx tan2(t) + 1 = sec2(t) sin2(t) + cos2(t) = 1 confuntion cos(- x)=cosx trigonometric identities reciprocal identity odd- even identity common denominator cos(x)= 1/sec(x) sin(pi/2 - X) = cosX trigonometric expressions
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Pythagorean identities
identity
tan(-x)= -tanx
csc(pi/2 - X) = secX
tan(pi/2 - X) = cotX
sec(pi/2 - X) = cscX
cot(-x)= -cotx
conjugate
sec(x)=
1/cos(x)
1 + cot2(t) = csc2(t)
Quotient identity
csc(-x)= -cscx
sec(-x)= secx
tan(x)=
cot(x)
1
=
cos(x)
sin(x)
cos(pi/2 - X) = sinX
cot(pi/2 - X) = tanX
sin(x)=
1/csc(x)
sin(-x)=-sinx
tan2(t) + 1 = sec2(t)
sin2(t) + cos2(t) = 1
confuntion
cos(-x)=cosx
trigonometric
identities
reciprocal identity
odd-even identity
common denominator
cos(x)=
1/sec(x)
sin(pi/2 - X) = cosX
trigonometric expressions