Answers to exercises in senior one math textbook. - Training Enrollment Network

Answers to exercises in senior one math textbook.

c / sinC = b / sinB = a / sinA

sinB =sinC / 2

b & gtc

So b is obtuse, and COSB =-(1-sinc * sinc/4) 0.5.

a = c*sinA / sinC

=c*sin(B+C) / sinC

=c*(sinB*cosC+sinC*cosB)/sinC

Just bring it into numerical calculation

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