Question 1060150
Rewrite:
[(sin172)^2]-[15(cos32)^2]
= 0.1392^2-15(0.8480)^2
= 0.0193-15(0.7191)
= 0.0193-10.7865
= -10.7672 where the last 2 decimals may change slightly because of rounding.
:
John