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Express each of the following in term...

Express each of the following in terms of trigonometric ratios of angles between `0o` and `45o` : `sin85o+cos e c\ 85o` (ii) `tan68o+sec68o` (iii) `cos e c\ 69o+cot69o`

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Express each of the following in terms of trigonometric ratios of angles between 0o and 45o : sin81o+tan81o (ii) sin72o+cot72o

Express each one of the following in terms of trigonometric ratios of angles lying between 0o and 45o sin59o+cos56o (ii) tan65o+cot49o (iii) sec76o+cos e c 52o

Express cot85^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(o) and 45^(@)

Express each one of the following in terms of trigonometric ratios of angles lying between 0o and 45o cos78o+sec78o (ii) cos e c 54o+sin72o (iii) cot85o+cos75o (iv) sin67o+cos75o

Express each of the following in terms of trigonometric ratios of angles lying between 0^(@)and45^(@) . (i) sin70^(@)+cos70^(@) (ii) sec76^(@)tan48^(@) (iii) cot68^(@)+"cosec"62^(@) (iv) sin85^(@)+"cosec"82^(@)

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

Evaluate the following: (i) sec50osin40o+cos40o cos e c 50o (ii) sec70osin20o-cos20o cos e c 70o

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Evaluate each of the following in the simplest form: sin60ocos30o+cos60osin30o (ii) sin60ocos45o+cos60osin45o (iii) cos60ocos30o+sin60osin30o (iv) cos60ocos30o-sin60osin30o

Evaluate the following: (i) (sin21o)/(cos69o)( ii) (tan10o)/(cot80o)( iii) (sec11o)/(cos ec79o)

RD SHARMA-TRIGONOMETRIC RATIOS-All Questions
  1. Evaluate the following: (i) sec50osin40o+cos40o\ cos e c\ 50o (ii)...

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  2. Prove that: (i) sin35osin55o-cos35ocos55o=0 (ii) (cos70o)/(sin20o)...

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  3. Express each of the following in terms of trigonometric ratios of a...

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  4. Express each of the following in terms of trigonometric ratios of a...

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  5. Evaluate the following: (i) ((sin35o)/(cos55o))^2+((cos55o)/(sin35o...

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  6. Evaluate: ((sin47o)/(cos43o))^2+((cos43o)/(sin47o))^2-4cos^2 45o

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

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  8. Dind theta; if sin(theta + 36^@) = cos theta; where theta + 36 is an ...

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  9. If tan2theta=cot(theta+6o) , where 2theta and theta+6o are acute an...

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  10. If t a n A"\ "="\ "cot B , prove that A+B=90o

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  11. If sec5A=cos e c\ (A+36^@) , where 5A is an acute angle, find the va...

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

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  13. Evaluate the following: (i) (sin20^@)/(cos70^@) (ii) (cos19^@)/(sin71^...

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  14. Evaluate the following: (i) (sin21o)/(cos69o) (ii) (tan10o)/(cot80o...

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  15. Evaluate the following: (i) ((sin49o)/(cos41o))^2+((cos41o)/(sin49o...

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  16. Evaluate the following: (i) (cot40o)/(tan50o)-1/2((cos35o)/(sin55o)...

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  17. Evaluate the following: (i) (tan35o)/(cot55o)+(cot78o)/(tan12o)-1 ...

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  18. Evaluate the following: (i) cos e c\ 31o-sec59o (ii) (sin72o+cos18...

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  19. Evaluate the following: (i) sin35osin55o-cos35ocos55o (ii) tan48ot...

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

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