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Express each one of the following in ...

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`

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

Express each of the following in terms of trigonometric ratios of angles between 0o and 450:sin85o+cos ec85o( ii) tan68o+sec68o (iii) cos ec69o+cot69o

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

Express sin67^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(@) and 45^(@)

Expresss each of the following in terms of T-ratios of angles lying between 0^theta and 45^@ . (i) sin 67^@+cos 75^@ (ii) cot 65^@+tan 49^@ (iii) sec 78^@+cosec 56^@ (iv) cosec 54^@+sin 72^@ .

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

Evaluate: |cos15osin15osin75ocos75o| .

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

RD SHARMA-TRIGONOMETRIC RATIOS-All Questions
  1. Evaluate the following: (i) sin35osin55o-cos35ocos55o (ii) tan48ot...

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

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

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

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

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

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  7. Prove that: tan20otan35otan45otan55otan70o=1

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  8. Prove that: sin48osec42o+cos48o\ cos e c\ 42o=2

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  9. Prove that: (sin70o)/(cos20o)+(cos e c\ 20o)/(sec70o)-2cos70o\ cos ...

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

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  11. If sintheta=cos(theta-45o) , where theta and theta-45o are acute an...

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

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

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

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

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

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

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  18. Write the maximum and minimum values of sintheta .

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  19. Write the maximum and minimum values of costheta .

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

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