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Evaluate the following: (i) sin35osin...

Evaluate the following: (i) `sin35osin55o-cos35ocos55o` (ii) `tan48otan23otan42otan67o` (iii) `sec50osin40o+cos40ocos e c\ 50o`

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Evaluate the following: (i) sin45osin30o+cos45ocos30o (ii) sin60ocos30o+cos60osin30o

Evaluate the following: (cos0o+sin45o+sin30o)(sin90o-cos45o+cos60o) (ii) (sin30o-sin90o+2cos0o)/(tan30otan60o)

Evaluate the following: cos^2 30o+cos^2 45o+cos^2 60o+cos^2 90o (ii) tan^2 30o+tan^2 60o+tan^2 45o

Evaluate the following: (i) cos60ocos45o-sin60osin45o (ii) sin^2 30o+sin^2 45o+sin^2 60o+sin^2 90o

Evaluate the following: (i) ((sin35)/(cos55))^2+((cos55)/(sin35))^2-2cos60 (ii) (2cos67)/(sin23)-(tan40)/(cot50)-cos0

Evaluate the following: (i) sec50^osin40^o + cos40^o\ cos e c\ 50^o (ii) sec70^osin20^o-cos20^o\ cos e c\ 70^o

Evaluate the following: (i) 2sin^2 30o-3cos^2 45o+tan^2 60o (ii) sin^2 30ocos^2 45o+4tan^2 30o+1/2sin^2 90o-2cos^2 90o+1/(24)cos^2 0o .

Evaluate the following: (i) (cos80^o)/(sin10^o)+cos59^o\ cos e c\ 31^o (ii) (cot54^o)/(tan36^o)+(tan20^o)/(cot70^o)-2 (iii) (2tan53^o)/(cot37^o)-(cot80^o)/(t a n\ 10^o)

Evaluate each of the following in the simplest form: sin60ocos30o+cos60osin30o (ii) sin60ocos45o+cos60osin45o

Evaluate the following: (i) (sin21o)/(cos69o) (ii) (tan10o)/(cot80o) (iii) (sec11o)/(cos e c\ 79o)

RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. Evaluate the following: (i) (tan35^@)/(cot55^@)+(cot78^@)/(tan12^@)-...

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  2. Evaluate the following: (i) cos e c\ 31^@-sec59^@ (ii) (sin72^@+cos...

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

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  4. Express each one of the following in terms of trigonometric ratios o...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. Write the maximum and minimum values of sintheta .

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