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[" 15.The value of "sin47^(@)+sin61^(@)-...

[" 15.The value of "sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=],[[" (a) "sin36^(@)," (b) "cos36^(@)],[" (c) "sin7^(@)," (d) "cos7^(@)]]

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The value of sin47^(@) + sin61^(@) - sin11^(@) -sin25^(@) is-

sin65^(@)+sin25^(@)=

sin47^(@)-sin25^(@)+sin61^(@)-sin11^(@)=

Value of sin 47^(@) + sin 61^(@)- sin 11 ^(@)-sin 25 ^(@) is

sin 47^@ + sin 61^@- sin 11^@- sin 25^@ =

The value of sin 47^(@) -sin 25^(@)+sin 61^(@)-sin 11^(@) is-

Prove that sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=cos7^(@) .

Show that sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=cos7^(@)

The value of sin^2 29^@+sin^2 61^@