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sec^2A -tan^2A=...

`sec^2A -tan^2A=`

A

0

B

1

C

2

D

none of these

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The correct Answer is:
B
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CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS [OR FUNCTIONS] OF POSITIVE ACUTE ANGLES-EXERCISE 2
  1. sec^2A -tan^2A=

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  2. tan A . cos A=

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  3. If theta is a positive acute then the value of sectheta cannot be

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  4. If theta a positive acute angle then the value of theta satisfies the ...

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  5. The minimum value of sec^2alpha+cos^2alpha is

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  6. The minimum value of sin theta.cos theta is

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  7. If 0lttheta lt90^@ then minimum value of 9tan^2theta+4cot^2theta is

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  8. If sin alpha =4/5 where alpha is a positive acute angle then cos alpha...

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  9. If x=sin^2alpha+cosec^2alpha , state which of the following is true?

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  10. If tan theta=a/b ,then which of the following is the value of (asin th...

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  11. If 0^@le A le90^@ and sin A =cosA , state which of the following is t...

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  12. State which of the following relation is true?

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  13. Prove the following identities: sin A cos A (tanA+cotA)=1

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  14. Prove the following identities: sinalpha cosalpha(tanalpha-cotalpha...

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  15. Prove the following identities: sqrt((1+sintheta)/(1-sin theta))=sec...

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  16. Prove the following identities: sqrt((cosectheta-1)/(cosec+1))=(1-si...

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  17. Prove the following identities: (cosphi)/(1+sinphi)+(1+sinphi)/(cos ...

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  18. Prove the following identities: (cosec theta-sintheta)^2+(sectheta-c...

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  19. Prove the following identities: (cottheta+cosectheta)^2=(1+costheta)...

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  20. Prove the following identities: (1+sintheta)/(1-sintheta)=(sectheta+...

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