sin30 = 1/2

sin45 =√2/2

sin60 =√3/2

cos30 =√3/2

cos45 =√2/2

cos60 = 1/2

tan30 =√3/3

tan45 = 1

tan60 =√3[ 1]

cot30 =√3

cot45 = 1

cot60 =√3/3

Extended data:

Two-angle sum formula

sin(A+B)= Sina cosb+cosAsinBsin(A-B)= Sina cosb-sinBcosA

cos(A+B)= cosa cosb-Sina sinb cos(A-B)= cosa cosb+Sina sinb

tan(A+B)=(tanA+tanB)/( 1-tanA tanB)tan(A-B)=(tanA-tanB)/( 1+tanA tanB)

ctg(A+B)=(ctgActgB- 1)/(ctg B+ctgA)ctg(A-B)=(ctgActgB+ 1)/(ctg B-ctgA)