3 years ago

Calculate the size of angle x. Give your answer to 1 decimal place

1 answer:

7 0

Cosine rule
Cosx=(11 ²+8²-(15²))/2(11)(8)
Cosx=(121+64-225)/176
Cosx=-40/176
Cosx=-5/22
X=cos-1 -5/22
X=103.1

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