Math, asked by sthuti3117, 10 months ago

मान ज्ञात कीजिए
(i)   \begin{bmatrix}  cosθ & -sinθ  \\  sinθ & cosθ  \end{bmatrix}

Answers

Answered by amitnrw
0

Given :    \begin{bmatrix}  cos\theta & -sin\theta  \\  sin\theta & cos\theta  \end{bmatrix}

To find :  मान ज्ञात कीजिए

Solution :

A  =  \begin{bmatrix}  cos\theta & -sin\theta  \\  sin\theta & cos\theta  \end{bmatrix}

हमें पता है की

A =  \begin{bmatrix}  a & b \\  c & d \end{bmatrix}

Det A = | A |  = Δ  =  ad  - bc  

A  =  \begin{bmatrix}  cos\theta & -sin\theta  \\  sin\theta & cos\theta  \end{bmatrix}

a = Cosθ

b = -Sinθ

c = Sinθ

d = Cosθ

Det A = | A |  = Δ  =  CosθCosθ - (-Sinθ)Sinθ

=>  Det A = | A |  = Δ  =   Cos²θ  +  Sin²θ

=> Det A = | A |  = Δ  =   1

A  =  \begin{bmatrix}  cos\theta & -sin\theta  \\  sin\theta & cos\theta  \end{bmatrix}  मान = 1

और सीखें

"निम्नलिखित सारणिकों के मान ज्ञात कीजिए

(i) -3 & -1 & 2  \\  0 & 0 & -1 \\ 3 & -5 & 0  

https://brainly.in/question/16385736

"मान ज्ञात कीजिए ।

  \begin{bmatrix}  2 & 4  \\  -5 & -1  \end{bmatrix}"

https://brainly.in/question/16385413

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