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If sin3theta=cos(theta-6^0), where (3th...

If `sin3theta=cos(theta-6^0),` where `(3theta)a n d(theta-6^0)` are both acute angles, then the value of `theta` is (a)`18^0` (b) `24^0` (c) `36^0` (d) `30^0`

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RD SHARMA-TRIGONOMETRIC RATIOS-All Questions
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  2. If cos2theta=sin4theta , where 2theta and 4theta are acute angles, ...

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

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

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  5. Write the maximum and minimum values of sintheta .

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  6. Write the maximum and minimum values of costheta .

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

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  8. What is the maximum value of 1/(cos ec \ theta)?

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  9. If tantheta=4/5, find the value of (costheta-sintheta)/(costheta+sinth...

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  10. If costheta=2/3, find the value of (sectheta-1)/(sectheta+1) .

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  11. If 3cottheta=4,find the value of (4costheta-sintheta)/(2costheta+sinth...

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  12. Given tantheta=1/(sqrt(5)), what is the value of (cos e c^2theta-sec^2...

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  13. If cottheta=1/(sqrt(3)) , show that (1-cos^2theta)/(2-sin^2theta)=3...

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  14. If tanA=3/4 and A+B=90^@, then what is the value of cotB ?

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  15. If A+B=90^@ and cosB=3/5 , what is the value of sinA ?

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  16. Write the acute angle theta satisfying sqrt(3)sintheta=costheta .

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  17. Write the value of tan10otan15otan75otan80o .

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  18. If tanA=3/4 and A+B=90^@, then what is the value of cotB ?

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  19. If tanA=5/(12), find the value of (sinA+cosA)secA .

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  20. If theta is an acute angle such that costheta=3/5 , then (sinthetatant...

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