Prove that,
`tan43^(@) = (cos2^(@) - sin2^(@))/(cos2^(@) + sin2^(@))`

Show that (cos2^@-sin2^@)/(cos2^@+sin2^@)=tan43^@

The value of (cos2^@ + sin2^@)/(cos2^@-sin2^@) is ___

"Prove that" tan (A+B) - tan (A - B) = (sin2 B)/(cos^(2)B - sin^(2) A).

Prove the following identities : tan^(2) A - tan^(2) B = (sin^(2) A - sin^(2) B)/ (cos^(2) A . cos^(2) B)

Prove that tan^2A - tan^2B = (sin(A+B).sin(A-B))/(cos^2A.cos^2B

Prove that (sin^(2)A)/(cos^(2)A)+1=(tan^(2)A)/(sin^(2)A)

Prove that : (1+sin 2A)/(cos 2A) = (cos A + sin A)/(cos A - sin A) = tan (pi/4 + A)

Prove that : (tan A + (1)/ (cos A))^(2) + (tan A - (1)/ (cos A))^(2) = 2 ((1 + sin^(2) A)/ (1 - sin^(2) A))

Prove that : (cos ^(2) A + tan ^(2) A - 1 )/( sin ^(2) A ) = tan ^(2) A .

Prove that (1 + sin2A) / (cos2A) = (cos A + sin A) / (cos A-sin A)