Find the value of `(cos53^@)/(sin57^@)`

Find the value of (5sin75^(@)sin77^(@)+2cos13^(@)cos15^(@))/(cos15^(@)sin77^(@))-(7sin81^(@))/(cos9^(@))

Find the value of (sin 25^@)/(sec65^@)+(cos 25^@)/(cosec 65^@) .

The simplest value of (cos 53^@)/(sin 37^@) is _______

Find the value of cos 200^(@)sin 160^(@) + sin (-340^@) cos (-380^@) .

The value of cos15^@-sin15^@ is

Find the value of cos^2 48^@-sin^2 12^@

If sin27^(@)=0.454 , then find the value of cos 243^(@) .

Find the value of (2 sin^2 63^@+1+2sin^2 27^@)/(3cos^2 17^@-2+3cos^2 73^@)

Find the value of sin^(-1)(sin7)+cos^(-1)(cos12)+tan^(-1){tan(-8)}+cot^(-1){cot(-11)}dot

Find the value of sin^(-1)(sin5)+cos^(-1)(cos10)+tan^(-1){tan(-6)}+cot^(-1){cot(-10)}