14-07-2016
Mathematics

Answered

Can someone please answer. There is one question. There's a picture. Thank you!

Can someone please answer. There is one question. There s a picture. Thank you! class=

Verified Answer :

olemakpadu olemakpadu

16-07-2016

By Cosine Rule:

CosT = (s² + r² - t²) /(2sr)

CosT = (10² + 11² - 7²) /(21110)

CosT = 172 /220 ≈ 0.7818

T = Cos⁻¹(0.7818)

T ≈ 38.57°

T ≈ 38.6°

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