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सिद्ध कीजिय की (cos 18^@ - sin 18^@)/(co...

सिद्ध कीजिय की `(cos 18^@ - sin 18^@)/(cos 18^@ + sin 18^@)=tan 27^@`.

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cos18^@-sin18^@=

cos18 ^ (@) - sin18 ^ (@) =

(sin 18^@)/( cos 72 ^@) = ?

Value of cos 18^@ - sin 72^@

If cos 18^(@) - sin 18^(@) = k sin 27^(@) , then k =

sin 78^(@) - sin 18^(@) + cos 132^(@) =

cos 72^@ - sin18^@ is equal to

3 cos 72 ^(@) -4 sin ^(3) 18^(@) = cos 36 ^(@).

Evaluate : (sin 18^@)/(cos 72^@)

3 cos72^(@)-4" sin"18^(@)=