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    Maths-
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    Question

    open square brackets table row 1 cell negative tan invisible function application alpha divided by 2 end cell row cell tan invisible function application alpha divided by 2 end cell 1 end table close square brackets open square brackets table row cell tan invisible function application alpha divided by 2 end cell 1 row 1 0 end table close square bracketsequals-

    1. zero matrix    
    2. sec2 alpha.I2    
    3. I2    
    4. None of these    

    The correct answer is: None of these

      To find the value of open square brackets table row 1 cell negative tan invisible function application alpha divided by 2 end cell row cell tan invisible function application alpha divided by 2 end cell 1 end table close square brackets open square brackets table row cell tan invisible function application alpha divided by 2 end cell 1 row 1 0 end table close square brackets.
      open square brackets table row 1 cell negative tan invisible function application alpha divided by 2 end cell row cell tan invisible function application alpha divided by 2 end cell 1 end table close square brackets x open square brackets table row cell tan invisible function application alpha divided by 2 end cell 1 row 1 0 end table close square brackets = open square brackets table row cell tan open parentheses alpha over 2 close parentheses end cell 1 row cell tan open parentheses open parentheses alpha over 2 close parentheses squared close parentheses end cell cell tan open parentheses alpha over 2 close parentheses end cell end table close square brackets.

      Therefore, none of the given options is correct.

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