PCHA UNIT 1 AND 2 CORRECT 100%
parent pythagorean identity - ANSWERsin^2x+cos^2x=1
tan pythagorean identity - ANSWER1+tan^2x=sec^2x
cot pythagorean identity - ANSWER1+cot^2x=csc^2x
sin(u+v) - ANSWERsinucosv+cosusinv
sin(u-v) - ANSWERsinucosv-cosusinv
cos(u+v) - ANSWERcosucosv-sinusinv
cos(u-v) - ANSWERcosucosv+sinusinv
tan(u+v) - ANSWERtanu+tanv/1-tanutanv
tan(u-v) - ANSWERtanu-tanv/1+tanutanv
sin2u - ANSWER2sinucosu
cos2u with sin - ANSWER1-2sin^2u
tan2u - ANSWER2tanu/1-tan^2u
sin(u/2) - ANSWER+-√1-cosu/2
cos(u/2) - ANSWER+-√1+cosu/2
parent pythagorean identity - ANSWERsin^2x+cos^2x=1
tan pythagorean identity - ANSWER1+tan^2x=sec^2x
cot pythagorean identity - ANSWER1+cot^2x=csc^2x
sin(u+v) - ANSWERsinucosv+cosusinv
sin(u-v) - ANSWERsinucosv-cosusinv
cos(u+v) - ANSWERcosucosv-sinusinv
cos(u-v) - ANSWERcosucosv+sinusinv
tan(u+v) - ANSWERtanu+tanv/1-tanutanv
tan(u-v) - ANSWERtanu-tanv/1+tanutanv
sin2u - ANSWER2sinucosu
cos2u with sin - ANSWER1-2sin^2u
tan2u - ANSWER2tanu/1-tan^2u
sin(u/2) - ANSWER+-√1-cosu/2
cos(u/2) - ANSWER+-√1+cosu/2
