`cos 15^@`

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cos15^@=

Find the value of cos15^@

Evaluate ((cos15^(@)-sin15^(@)+1)/(cos15^(@)+sin15^(@)+1))((1+sin15^(@))/(cos15^(@)))

cos15^(@)-cos75^(@)=

cos15^(@)+cos105^(@)=

4cos^(3)15^(@)-3cos15^(@)=

cos15^(@)=?

Prove the following: frac(cos15^@-sin15^@)(cos15^@+sin15^@)=1/sqrt3

Fill in the gaps with correct answer . The value of (cos15^@+sin15^@)/(cos15^@-sin15^@) = ____