# MATH CHECK

posted by
**Confused**
.

COS[ARCSIN (SIN 3PI/4)]

=COS[ARCSIN (SQRT2/2)]

=COS [PI/4]

= SQRT2/2

posted by
**Confused**
.

COS[ARCSIN (SIN 3PI/4)]

=COS[ARCSIN (SQRT2/2)]

=COS [PI/4]

= SQRT2/2