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cos15^@+cos105^@=...

`cos15^@+cos105^@=`

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cos 15^@+ cos 105^@ =?

sin15^@+cos105^@=

Prove that: cos 105^@+cos15^@=sin 75^@-sin 15^@

Show that (cos15^o -cos105^o )/(cos15^o +cos105^o)=sqrt3

Prove that, cos105^(@)+cos15^(@)=sin75^(@)-sin15^(@)

Prove that : cos 105^@ + cos 15^@= sin 75^@- sin 15^@ .

Prove that sin105^@+cos105^@=cos45^@

Prove that : sin 105^@ + cos 105^@ = cos 45^@ .

Prove that : sin 105^@ + cos 105^@=1/sqrt2 .