Find the principal values of the following from Mathematics Inv

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 Multiple Choice QuestionsShort Answer Type

11. Find the values of each of the expressions tan to the power of negative 1 end exponent open parentheses tan space fraction numerator 3 straight pi over denominator 4 end fraction close parentheses.


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12. Using principle value, evaluate the following :

cos to the power of negative 1 end exponent open parentheses cos fraction numerator 2 straight pi over denominator 3 end fraction close parentheses plus sin to the power of negative 1 end exponent open parentheses sin fraction numerator 2 straight pi over denominator 3 end fraction close parentheses.
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13.

Find the value of each of the following :

(i) sin (sin–1x + cos–1.x) (ii) cos (sec–1x + cosec–1x). | x | ≥  1

 

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14. Find the principal value of sin–1  open parentheses fraction numerator 1 over denominator square root of 2 end fraction close parentheses.
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15. Find the principal value of cot–1 open parentheses negative fraction numerator 1 over denominator square root of 3 end fraction close parentheses
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16. Find the principal values of the following

sin to the power of negative 1 end exponent open parentheses negative 1 half close parentheses
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17. Find the principal values of the following

cos to the power of negative 1 end exponent open parentheses fraction numerator square root of 3 over denominator 2 end fraction close parentheses
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18. Find the principal values of the following

cosec-1(2)

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19. Find the principal values of the following

tan to the power of negative 1 end exponent left parenthesis negative square root of 3 right parenthesis


Let space straight y space equals space tan to the power of negative 1 end exponent left parenthesis negative square root of 3 right parenthesis space space space space space space space space space where space minus straight pi over 2 less than straight y less than straight pi over 2
therefore space space space tan space y space equals space minus square root of 3 space space space space space space space space space space space space where space minus straight pi over 2 space less than straight y less than straight pi over 2
therefore space space space tan space straight y space equals space minus tan straight pi over 3 equals tan open parentheses negative straight pi over 3 close parentheses space where space minus straight pi over 2 less than straight y less than straight pi over 2
therefore space space space space straight y equals negative straight pi over 3
therefore   required principal value = negative straight pi over 3.
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20. Find the principal values of the following

cos to the power of negative 1 end exponent open parentheses negative 1 half close parentheses

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