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The value of tan1otan2otan3oddottan89...

The value of `tan1otan2otan3oddottan89o` is (a) 1 (b) `-1` (c) `0` (d) None of these

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
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  7. The value of tan1otan2otan3oddottan89o is (a) 1 (b) -1 (c) 0 (d) No...

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  8. The value of cos1^@cos2^@cos3^@ .......................................

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  9. The value of tan10otan15otan75otan80o is -1 (b) 0 (c) 1 (d) None of...

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  10. If theta and 2theta-45^@ are acute angles such that sintheta=cos(2thet...

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  11. If 5theta and 4theta are acute angles satisfying sin5theta=cos4theta...

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  12. (2tan3 0^(@))/(1-tan^2 3 0^(@))is equal to (a)sin60^(@) (b) cos60^(@) ...

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

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  17. If costheta=2/3 , then 2sec^2theta+2tan^2theta-7 is equal to (a) 1 (b)...

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