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Express cos75o+cot75o in terms of ang...

Express `cos75o+cot75o` in terms of angles between `0o` and `30o` .

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Express cot 85^o +cos75^o in terms of trigonometric ratios of angles between 0^o and 45^o

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Express sin 67^(@)+cos75^(@) in terms of trigononmertic ratios of angles between 0^(@)and 45^(@) .

What is the bond order between C and O in CO ?

From the top of a building 60m high the angles of depression of the top and the bottom of a tower are observed to be 30o and 60o . Find the height of the tower.

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. Express each one of the following in terms of trigonometric ratios o...

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  2. Express each one of the following in terms of trigonometric ratios ...

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  3. Express cos75o+cot75o in terms of angles between 0o and 30o .

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  4. If sin3A=cos(A-26^@) , where 3A is an acute angle, find the val...

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  5. If A ,\ B ,\ C are the interior angles of a triangle A B C , prove ...

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  6. Prove that: tan20^@tan35^@tan45^@tan55^@tan70^@=1

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  7. Prove that: sin48^@sec42^@+cos48^@\ cos e c\ 42^@=2

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  8. Prove that: (sin70^@)/(cos20^@)+(cos e c\ 20^@)/(sec70^@)-2cos70^@\ ...

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  9. Prove that: (cos80^@)/(sin10^@)+cos59^@\ cosec\ 31^@=2

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  10. If sintheta=cos(theta-45^@) , where theta and theta-45^@ are acute a...

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  11. If A, B and C are interior angles of a triangle ABC, then show that "s...

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  12. If 2theta+45o and 30o-theta are acute angles, find the degree measu...

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  13. If theta is a positive acute angle such that sectheta=cos e c\ 60o ...

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  14. If cos2theta=sin4theta , where 2theta and 4theta are acute angles, ...

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  15. If sin3theta=cos(theta-6^0), where (3theta)a n d(theta-6^0) are both...

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  16. If s e c4A=cos e c(A-20^@) , where 4A is an acute angle, find the ...

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  17. Write the maximum and minimum values of sintheta .

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  18. Write the maximum and minimum values of costheta .

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

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

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