Transformation Trigonometry

Sin(A + B ) + Sin(A-B) = 2SinA . CosB
Sin(A + B ) - Sin(A-B) = 2CosA . SinB
Cos(A+B )+ Cos(A-B) = 2CosA . CosB
Cos(A+B ) - Cos(A-B) = -2SinA . SinB

Sabin(S) Sanga(S) Sancho(S) Chhaina(C)
;ljg ;+u ;fFrf] 5g} .

Sampati (S) Sabai(S) Chorle(C) Soryo(S)
;DklQ ;+a} rf]/n] ;f]¥of] .

Chori(C) Chori(C) Chupke (C) Chupke(C)
rf/] L rf]/L rK' s]
r'Ks]
Chorda(C) Chordai (C)
Sampati(S) Shakiyo(S)
rfb] f{ rfb] }{
;DklQ ;lsof] .

A+B + A-B = 2 A B

C+ D = 2 C+ D C- D

22

A+B + A-B = 2 A B

Sabin + Sanga = 2 Sancho Chhaina
S + S =2 SC
Sin + Sin = 2 Sin Cos

Sin(A+B) + Sin(A-B) = 2 SinA CosB

A+B - A-B = 2 A B

Sampati - Sabai = 2 Chorle Shoryo
S - S =2 C S
Sin - Sin = 2 Cos Sin

Sin(A+B) - Sin(A-B) = 2 CosA SinB

A+B + A-B = 2 A B

Chori + Chori = 2 Chupke Chupke
C + C =2 CC
Cos + Cos = 2 Cos Cos

Cos(A+B) + Cos(A-B) = 2 CosA CosB

A+B - A-B = - 2 A B

Chorda - Chordai = - 2 Sampati Shakiyo
C - C = -2 SS
Cos - Cos = - 2 Sin Sin

Cos(A+B) - Cos(A-B) = -2 SinA SinB