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सिद्ध कीजिए कि cos(A+B)+sin(A-B)=2sin(...

सिद्ध कीजिए कि
`cos(A+B)+sin(A-B)=2sin(45^(@)+A)cos(45^(@)+B)`.

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2sin45^(@)cos45^(@)

cos (A + B) + sin (AB) = 2sin (45 ^ (0) + A) cos (45 ^ (@) + B)

cos (A +B) + sin (A -B) = 2 sin (45 ^(@) + A) cos ( 45 ^(@) + B).

sin^(2)45^(@)+cos^(2)45^(@)=

sin 45^(@)(cos 45^(@)) =…………..

Prove the following : cos(A+B)+sin(A-B) 2sin( 45^@ +A)cos( 45^@ +B)

2sin45^@*cos45^@ = …………….

Evaluate sin45^(@)+cos45^(@)

Prove that: i) sin(A+B)cos(A-B)-cos(A+B)sin(A-B)=sin2B ii) cos(45^(@)-A)cos(45^(@)-B)-sin(45^(@)-A)sin(45^(@)-B)=sin(A+B)

Prove that: i) sin(A+B)cos(A-B)-cos(A+B)sin(A-B)=sin2B ii) cos(45^(@)-A)cos(45^(@)-B)-sin(45^(@)-A)sin(45^(@)-B)=sin(A+B)