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सिद्ध कीजिए कि : sin 55^(@) * cos 48^...

सिद्ध कीजिए कि :
`sin 55^(@) * cos 48^(@) = cos 35^(@) * sin 42^(@)`

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cos 48^@ - sin 42 ^@ = ?

Evaluate cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)

Evaluate cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)

Evaluate : cos 48^(@) - sin 42^(@)

Prove that sin 55^(@) - cos55^(@) = sqrt2 sin 10^(@)

Evaluate: sin 42^(@)sin 48^(@)-cos 42^(@)cos 48^(@)

(sin48^(@))/(cos42^(@))+(cos48^(@))/(sin42^(@))=2

Evaluate: sin 35^(@) cdot sin 55^(@) - cos 35^(@) cdot cos 55^(@).

Evaluate : (sin 35^(@) cos 55^(@) + cos 35^(@) sin 55^(@))/ (cosec^(2) 10^(@) - tan^(2) 80^(@))

Show that: sin 42^(@)sec 48^(@)+cos 42^(@)cosec 48^(@)=2