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S?R Ali 5 years, 8 months ago
?Royal Thakur? 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
The vertices of the triangle ΔABC are A (1, 2), B (- 3, 2) and C (3, - 2). The sides of the triangle are AB, BC, CA and we have to find the tangent ratio of the angle A.
The slope of the line AB is
m₁ = (2 - 2) / (- 3 - 1)
= 0 and
that of the line CA is
m₂ = (2 + 2) / (1 - 3)
= - 2
Then the angle A is determined from
tanA = (m₁ - m₂) / (1 + m₁m₂)
= (0 + 2) / (1 + 0)
= 2
Hence tanA = 2
Posted by S?R Ali 5 years, 8 months ago
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Posted by S?R Ali 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
A collection of elements is known as a subset of all the elements of the set are contained inside another set.
Set A is said to be a subset of Set B if all the elements of set A are also present in Set B.
Example: If set A has {X, Y} and set B has {X, Y, Z}, then A is the subset of B because elements of A are also present in set B.
A ⊆ B; which means Set A is a subset of Set B.
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