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uranmaximum [27]
2 years ago
12

Round to the nearest tenth if necessary

Mathematics
1 answer:
GREYUIT [131]2 years ago
8 0

Answer:

Step-by-step explanation:

a=30

b= 17

c= 18

we actually already found angles B and C for the last problem I think we said 30 and 32 so we would be able to guess that angle A is about 118° but.. let's do the math... and see

angle A = arcCos[ b^2 + c^2 - a^2 / 2*b* c ]

A = arcCos[ 289 +324 - 900 / 2*17*18]

A = arcCos[ -287 / 612 ]

A = arcCos[ -0.468954 ]

A = 117.9664 °

ohh and we're off by 0.0336   phooy  :P soo far off... :P

rounding to nearest 10th

A = 118.0 °  ( ohh right on the money  :P)  yay, I feel better.  :P

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