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Prove that (1+tan^2 O/) + (1+1/tan^2 O/...

Prove that ` (1+tan^2 O/) + (1+1/tan^2 O/) = 1/(sin^2 O/ - sin^4 O/)`

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VGS PUBLICATION-BRILLIANT-TRIGONOMETRY-EXERCISE
  1. Evaluate (tan^2 60 + 4 cos^2 45 + 3 sec^2 30 + 5 cos^2 90)/(cosec 30 ...

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  2. If sin O//(1-cos O/) + sin O//(1+cosO/) = 4 (0^o < O/ < 90^o) then ...

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  3. Prove that (1+tan^2 O/) + (1+1/tan^2 O/) = 1/(sin^2 O/ - sin^4 O/)

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  4. If cotA=5/12 then sinA+cosA = ………………

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  5. Which of the following is not possible value for sin x …………

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  6. Which of the following in NOT defined?

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  7. If sinA=24/25then cotA

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  8. If sintheta=costheta (0^0< theta<90^0) then tantheta+cottheta = ……………

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  9. If sectheta+tantheta=3 then sectheta-tantheta = …………….

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  10. In triangleABCAB=c,BC=a,AC=b and angleBAC=theta then which is not the ...

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  11. The value of tantheta in terms of cosectheta is..........................

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  12. Observe the following: (I) sin^2 20^@+sin^2 70^@=1 (II) log2(sin90^@)=...

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  13. tan36^@.tan54^@+sin30^@=.......................

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  14. If sinA=24/25, then secA=....................

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  15. Which one of the following is NOT defined?

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  16. sqrt (1-cos^(2) A // 1+cot^(2) A )

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  17. If cottheta-cosectheta=p then cottheta+cosectheta=.................

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  18. tantheta in terms of costheta is...............................

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  19. Chose the correct figure for which sinA=5/13

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  20. sectheta=

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