Question

solve the trig question.. ​

Answer 1

rationalise above and below we get

1 - {sin^2@(1-cos@)/sin^2@} + sin^2@/(1 - cos@)sin@ - sin@/1-cos@

1 - 1 + cos@ + sin@/(1 - cos@) - sin@/(1 - cos@)

0+ cos@+0

cos@