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" 1."sin25^(@)cos65^(@)...

" 1."sin25^(@)cos65^(@)

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Evaluate : sin25^(@)cos65^(@)+cos25^(@)sin65^(@)

The value of (sin25^(@)cos65^(@)+cos25^(@)sin65^(@))/(tan^(2)27^(@)-cos ec^(2)20^(@))

The value of (sin25^(@)cos65^(@)+cos25^(@)sin65^(@))/(tan^(2)70^(@)-cosec^(2)20^(@))

Evaluate: sin 25^(@) cos 65^(@) + cos 25^(@) sin 65^(@) .

Find the value of (sin25^(@))/(cos65^(@))+(tan23^(@))/(cot67^(@))

((sin25^(@))/(cos65^(@)))^(2)+((tan65^(@))/(cot25^(@)))^(2)-2cos^2 45^@=

Prove that, sin65^(@)+cos65^(@)=sqrt(2)cos20^(@)

(a) Prove that sin65^(@)+cos65^(@)=sqrt(2)cos 20^(@) (b) Prove that sin47^(@)+cos77^(@)=cos17^(@)