SOLUTION: Evaluate sinē 172° - 15cosē 32° to four significant digits.

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Question 1060150: Evaluate sinē 172° - 15cosē 32° to four significant digits.
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
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