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In a /\A B C , right angled at B , if...

In a ` /_\A B C` , right angled at `B` , if `A B=12` and `B C=5` , find: (i) `sinA` and `tanA` (ii) `cosC` and `cotC`

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. Prove the following: sinthetasin(90^0-theta)-costhetacos(90^0-theta)=...

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  2. In a /\A B C , right angled at B , if A B=4 and B C=3 , find all t...

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  3. In a /\A B C , right angled at B , if A B=12 and B C=5 , find: (i) ...

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  4. If sinA=3/5 , find cosA and tanA .

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  5. If costheta=8/(17) , find the other five trigonometric ratios.

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  6. In a right triangle A B C right angled at B, if sinA=3/5 , find a...

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  7. If sinA=1/3, evaluate cosA\ cosec\ A+tanAsecA.

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  8. In a right triangle A B C , right angled at C , if tanA=1 , then...

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  9. If secalpha=5/4, evaluate (1-tanalpha)/(1+tanalpha).

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  10. If sintheta=1/2, show that (3costheta - 4cos^3theta)=0

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  11. If tanA=2 , evaluate secAsinA+tan^2A-cos e c\ A .

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  12. Given /\ A C B right angled at C in which A B=29\ u n i t s , B C=21...

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  13. If cotB=(12)/5 , prove that tan^2B-sin^2B=sin^4Bsec^2B .

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  14. If secalpha=5/4 , verify that (tanalpha)/(1+tan^2alpha)=(sinalpha)/...

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  15. If sintheta=4/5 , find the value of (4tantheta-5costheta)/(sectheta...

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  16. In a right triangle A B C right angled at B , /A C B=theta , A B...

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  17. From Fig. , write the values of: (i) sinA (ii) cotA

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  18. From Fig., write the values of: (i) tanB (ii) sin^2B+cos^2B

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  19. In /\O P Q right angled at P ,\ O P=7c m , O Q-P Q=1c m . Determine...

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  20. In DeltaP Q R ,right angled at Q, P R+Q R=25cm and P Q=5c m. Determine...

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