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If sintheta=a/(sqrt(a^2+b^2)),\ 0<theta<...

If `sintheta=a/(sqrt(a^2+b^2)),\ 0

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If theta=3alphaand sintheta=a/(sqrt(a^2+b^2)), the value of the expression acos e calpha-bsecalpha is (a)a/(sqrt(a^2+b^2)) (b) 2sqrt(a^2+b^2) (c) a+b (d) none of these

sintheta+costheta=sqrt(2)

If 2costheta-sintheta=(1)/(sqrt(2)),(0^(@)ltthetalt90^(@)) the value of 2sintheta+costheta is

If 3costheta-sintheta=(1)/(sqrt(2)),(0^(@)ltthetalt90^(@)) , then the value of 3sintheta+2costheta .

If sintheta+costheta=sqrt(2) , then find the value of sintheta-costheta .

If sintheta=(sqrt(3))/(2)and0^(@)ltthetalt90^(@) , then the value of tan(theta-15^(@)) is

Prove that the product of the lengths of the perpendiculars drawn from the points (sqrt(a^2-b^2),""""0) and (-sqrt(a^2-b^2),""""0) to the line x/a costheta + y/b sintheta=1 is b^2 .

If tantheta=-(1)/(sqrt(3)),sintheta=(1)/(2)andcostheta=-(sqrt(3))/(2) , then the principal value of theta will be

RD SHARMA-TRIGONOMETRIC IDENTITIES-All Questions
  1. If tantheta+cottheta=2 , find the value of tan^2theta+cot^2theta .

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  2. If cos e c\ A=sqrt(2) , find the value of (2sin^2A+3cot^2A)/(4tan^2...

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  3. If sintheta=a/(sqrt(a^2+b^2)),\ 0<theta<90o , find the values of co...

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  4. If costheta=4/5 , find all other trigonometric ratios of angle thet...

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  5. If sintheta=1/(sqrt(2)) , find all other trigonometric ratios of an...

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  6. If tantheta=1/(sqrt(2)) , find the value of (cos e c^2theta-sec^2th...

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  7. If tantheta=3/4 , find the value of (1-costheta)/(1+costheta)

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  8. If tantheta=(12)/5 , find the value of (1+sintheta)/(1-sintheta)

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  9. If cottheta=1/(sqrt(3)) , find the value of (1-cos^2theta)/(2-sin^2...

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  10. If cos e c\ A=sqrt(2) , find the value of (2sin^2A+3cot^2A)/(4(tan^...

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  11. If cottheta=sqrt(3) , find the value of (cos e c^2theta+cot^2theta)...

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  12. If 3costheta=1 , find the value of (6sin^2theta+tan^2theta)/(4costh...

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  13. If sqrt(3) tantheta=3sintheta, " prove that " (sin^(2)theta-cos^(2)the...

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  14. If cos e c\ theta=(13)/(12) , find the value of (2sintheta-3\ cos\ ...

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  15. If sintheta+costheta=sqrt(2)cos(90o-theta) , find cottheta .

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  16. Define an identity.

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  17. What is the value of (1-cos^2theta)cos e c^2theta ?

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  18. What is the value of (1+cot^2theta)sin^2theta ?

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  19. What is the value of sin^2theta+1/(1+tan^2theta) ?

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  20. If sectheta+tantheta=x , write the value of sectheta-tantheta in te...

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