If E( )= [ array cc & - & array ] , then value of E (α) . E (β) is -
Mathematics · JEE Main · NTA Exams — Matrices and Determinants
\(\text { If } E(\theta)=\left[\begin{array}{cc}
\cos \theta & \sin \theta \\
-\sin \theta & \cos \theta
\end{array}\right]\), then value of E (α) . E (β) is -
- E (0°)
- E (90°)
- E (α + β)
- E (α – β)
Answer
(C) E ( α + β )
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