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Write the maximum and minimum values of `costheta` .

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. If s e c4A=cos e c(A-20^@) , where 4A is an acute angle, find the ...

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  2. Write the maximum and minimum values of sintheta .

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  3. Write the maximum and minimum values of costheta .

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  4. What is the maximum value of 1/(sectheta) ?

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  5. What is the maximum value of 1/(cos ec \ theta)?

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  6. If tantheta=4/5, find the value of (costheta-sintheta)/(costheta+sinth...

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  7. If costheta=2/3, find the value of (sectheta-1)/(sectheta+1) .

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  8. If 3cottheta=4,find the value of (4costheta-sintheta)/(2costheta+sinth...

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  9. Given tantheta=1/(sqrt(5)), what is the value of (cos e c^2theta-sec^2...

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  10. If cottheta=1/(sqrt(3)) , show that (1-cos^2theta)/(2-sin^2theta)=3...

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  11. If tanA=3/4 and A+B=90^@, then what is the value of cotB ?

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  12. If A+B=90^@ and cosB=3/5 , what is the value of sinA ?

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  13. Write the acute angle theta satisfying sqrt(3)sintheta=costheta .

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  14. Write the value of tan10^@tan15^@tan75^@tan80^@ .

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  15. If tanA=3/4 and A+B=90^@, then what is the value of cotB ?

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  16. If tanA=5/(12), find the value of (sinA+cosA)secA .

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  17. If theta is an acute angle such that costheta=3/5 , then (sinthetatant...

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  18. If tantheta=a/b , then (asintheta+bcostheta)/(asintheta-bcostheta) is ...

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  19. If 5tantheta-4=0, then the value of (5sintheta-4costheta)/(5sintheta+4...

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  20. If 16cotx=12, then (sinx-cosx)/(sinx+cosx) equals (a) 1/7 (b) 3/7 (c) ...

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