Question

please give answer by on notebook...soon of trignometry chapter.

Answer 1

Step-by-step explanation:

$\tan \: (A + B - C) = 1 \\ \\ \therefore \: \tan \: (A + B - C) = \tan \: 45 \degree \\ ( \because \: \tan \: 45 \degree = 1) \\ \\ \therefore \: A + B - C = 45 \degree ....(1) \\ \\ \sec \: (B + C - A) = 2 \\ \\ \therefore \sec \: (B + C - A) = \sec \:60 \degree \\ ( \because \: \sec \: 60 \degree = 2) \\ \\ \therefore \: B + C - A = \:60 \degree....(2) \\ \\ Adding \: equations \: (1) \: \& \: (2) \\ \\ A + B - C + B + C - A \\ = 45 \degree + 60 \degree \\ \\ \therefore 2B = 105 \degree \\ \\ \therefore B = \frac{105 \degree}{2} \\ \\ \huge \purple{ \boxed{\therefore B = 52.5 \degree}} \\ \\ subtracting \: equation\: (1) \: from \: (2) \\ \\ (B + C - A) - (A + B - C) \\ = 60 \degree - 45 \degree \\ \\ \therefore \: B + C - A - A - B + C \\ = 60 \degree - 45 \degree \\ \therefore \: 2C - 2A = 15 \degree \\ \\ \therefore \: 2(C - A) = 15 \degree\\ \\ \therefore \: C - A = \frac{15 \degree}{2} \\ \\ \therefore \: C - A = 7.5 \degree \\ \\ \therefore \: C = A + 7.5 \degree....(3) \\ \\ \because \: A + B + C = 180 \degree \\ \\ \therefore \: A + 52.5 \degree + A + 7.5 \degree = 180 \degree \\ \\ \therefore \: 2A + 60 \degree = 180 \degree \\ \\ \therefore \: 2A = 180 \degree - 60 \degree \\ \\ \therefore \: 2A = 120 \degree \\ \\ \therefore \: A = \frac{120 \degree }{2} \\ \\\huge \red{ \boxed{ \therefore \: A = 60 \degree}} \\ \\ thus \\ \\ C = A + 7.5 \degree \\ \\ = 60 \degree \: + 7.5 \degree \\ \\ \huge \orange{ \boxed{\therefore \: C = 67.5 \degree}}$

Answer 2

Answer:

Sheep and goats were first domesticated roughly 11,000 years ago. These are called beasts of burden. The primary animal to be tamed or domesticated was a Goat. Afterward the first humans started domesticating wolves which then developed to Dogs