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If : cos theta+sintheta=1, "then" : cos ...

If : `cos theta+sintheta=1, "then" : cos theta-sintheta`

A

1

B

-1

C

`pm 1`

D

none of these

Text Solution

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The correct Answer is:
C
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-MCQs
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  2. if : p*cos theta=sqrt(p^(2)+q^(2)).sin theta, "then" : q * sin theta=

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  3. If : cos theta+sintheta=1, "then" : cos theta-sintheta

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  4. If : sin theta= sqrt3*costheta, "then" : 2(sin theta+costheta)-1=

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  5. If : cos theta-sintheta=sqrt2.sin theta, "then": costheta+sintheta=

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  6. If : sin^(2)theta+sin^(4)theta=1, "then": tan^(4)theta-tan^(2)theta=

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  7. If : sin^(2)theta+sin^(4)theta=1, "then": cot^(2)theta+cot^(4)theta=

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  8. If : sectheta+costheta=2 "then" : sec^(2)theta-sec^(4)theta=

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  9. If : tan theta+cot theta=2, "then" : tan^(2)theta-tan^(3)theta=

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  10. If : cos^(2)theta-sin^(2)theta=tan^(2)phi, "then" : cos^(2)phi-sin^(2)...

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  11. If : cos^(2)theta-sin^(2)theta=tan^(2)alpha and costheta*cosalpha=cosb...

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  12. If : a * sec alpha+b * tan alpha=m and : atan alpha+b * sec alpha=n, ...

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  15. Given that:(1 + cos alpha) (1 + cos beta) (1 + cos gamma) = (1 - cos a...

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  16. If (secalpha+tanalpha)(secbeta+tanbeta)(secgamma+tangamma)=tanalphatan...

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  17. If : (csc alpha - cot alpha)(csc beta -cot beta)(csc gamma-cot gamma)=...

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  18. If tanalpha + cotalpha= a, then the value of tan^4 alpha +cot^4 alpha ...

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