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The sides of two angles of a triangle are equal to 5/13 and 99 / 101. What is the the cosine of the third angle?

The sides of two angles of a triangle are equal to 5/13 and 99 / 101. What is the the cosine of the third angle?

Grade:11

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
12 years ago

Dear student,

Use cosine law

CosC=a2+b2-c2/2ab

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Sagar Singh

B.Tech, IIT Delhi

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