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Ex 3.2, 6 - Chapter 3 Class 12 Matrices
Last updated at June 7, 2023 by Teachoo
Ex 3.2
Ex 3.2, 1
Ex 3.2, 2 (i)
Ex 3.2, 2 (ii) Important
Ex 3.2, 2 (iii)
Ex 3.2, 2 (iv)
Ex 3.2, 3 (i)
Ex 3.2, 3 (ii) Important
Ex 3.2, 3 (iii)
Ex 3.2, 3 (iv) Important
Ex 3.2, 3 (v)
Ex 3.2, 3 (vi) Important
Ex 3.2, 4
Ex 3.2, 5
Ex 3.2, 6 You are here
Ex 3.2, 7 (i)
Ex 3.2, 7 (ii) Important
Ex 3.2, 8
Ex 3.2, 9
Ex 3.2, 10
Ex 3.2, 11
Ex 3.2, 12 Important
Ex 3.2, 13 Important
Ex 3.2, 14
Ex 3.2, 15
Ex 3.2, 16 Important
Ex 3.2, 17 Important
Ex 3.2, 18
Ex 3.2, 19 Important
Ex 3.2, 20 Important
Ex 3.2, 21 (MCQ) Important
Ex 3.2, 22 (MCQ) Important
Chapter 3 Class 12 Matrices
Serial order wise
Transcript
Ex 3.2, 6 Simplify cos θ[■8(cos θ&sin θ@−sin θ&cos θ)] + sin θ [■8(sin θ&−cos θ@cos θ&sin θ)] cos θ[■8(cos θ&sin θ@−sin θ&cos θ)] + sin θ [■8(sin θ&−cos θ@cos θ&sin θ)] = [■8("cos " θ("cos " θ)&cos θ(sin θ)@cos θ (−𝑠𝑖𝑛θ)&cos θ(cos θ))] + [■8(sin θ(sin θ)&sin θ(−"cos " θ) @sin θ("cos " θ)&sin θ(sin θ))] = [■8(𝐜𝐨𝐬𝟐 𝜽&𝐜𝐨𝐬 𝛉 𝐬𝐢𝐧 𝜽@−𝐜𝐨𝐬 𝛉 𝐬𝐢𝐧 𝜽&𝐜𝐨𝐬𝟐 𝜽)] + [■8(𝐬𝐢𝐧𝟐 𝜽&−𝐜𝐨𝐬 𝛉 𝐬𝐢𝐧 𝜽@𝐬𝐢𝐧 𝛉 𝐜𝐨𝐬 𝜽&𝐬𝐢𝐧𝟐 𝜽)] = [■8(cos2 θ+sin2 θ&sin θ cos θ−cos θ sin θ@−cos θ sin θ+sin θ cos θ&cos2 θ+sin2 θ)] = [■8(cos2 θ+sin2 θ&[email protected]&cos2 θ+sin2 θ)] = [■8(𝟏&𝟎@𝟎&𝟏)]
