[[cos15''sin15''],[sin75''cos75'']]=0

Evaluate the following determinants: |[x-7, x],[5,x+1]| (ii) |[costheta ,-sintheta],[sintheta,costheta]| |[cos15^0,sin15^0],[sin75^0,cos75^0]| (iv) |[a+i b, c+i d],[-c+i d, a-i b]|

Evaluate: |[cos15^@ sin15^@],[sin75^@cos75^@]| .

Show that |[cos 15^@ sin 15^@],[sin 75^@ cos 75^@]| =0

Evaluate: |(cos15^0,sin15^0),(sin75^0,cos75^0)|

Evaluate: det[[cos15^(0),sin15^(0)sin75^(0),cos75^(0)]]

Evaluate det[[cos15^(@),sin15^(@)sin75^(@),cos75^(@)]]

If A=[[sin15^@ cos15^@],[-sin75^@ cos75^@]] , then evaluate |A|.

Evaluate: |(cos15^@,sin15^@),(sin75^@,cos75^@)|

Show that {:|(cos15^@, sin15^@),(sin75^@, cos75^@)|:}= 0

Show that |{:(cos 15^@ ,sin 15^@),(sin 75^@,cos 75^@):}|=0