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Evaluate: (i) (sin^2 63^@+sin^2 27^@)/(c...

Evaluate:
(i) `(sin^2 63^@+sin^2 27^@)/(cos^2 17^@+cos^2 73^@)`
(ii) `sin 25^@ cos 65^@+cos 25^@sin 65^@`

Text Solution

Verified by Experts

1)=`(sin^2 63+sin^2 27)/(cos^2 17+cos^2 73)`
=`(sin^2 63+cos^2 63)/(sin^2 73+cos^2 73)`
=1/1=1
2)=sin 25cos65+cos25sin65
=`cos^2 65+sin^2 65`
=1
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