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The value of cos 10^@ - sin 10^@ is...

The value of `cos 10^@ - sin 10^@` is

A

positive

B

negative

C

0

D

1

Text Solution

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The correct Answer is:
A
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OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
  1. The value of cos 10^@ - sin 10^@ is

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  2. The value of cos 1^@ cos 2^@ cos 3^@... cos 179^@ is

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  3. The value of tan1^@ tan 2^@ tan 3^@ ... tan 89^@ is

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  4. The maximum value of cos^2(pi/3-x)-cos^2(pi/3+x), is

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  5. Which of the following is correct sin 1^@ > sin 1

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  6. Given A=sin^2theta+cos^2theta, then for all real theta, 1lt=Alt=2 (b...

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  7. The expression tan^2alpha+cot^2alpha is

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  8. If tantheta=-4//3, then sintheta is

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  9. If sintheta+costheta=sqrt2costhetathen costheta-sintheta is equal to

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  10. In a right angled triangle, the hypotenuse is four times as long as th...

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  11. If theta lies in the first quardrant and costheta=(8)/( 17 ), then fi...

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  12. cos^4(pi/8)+cos^4((3pi)/8)+cos^4((5pi)/8)+cos^4((7pi)/8)=

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  13. If tan(A+B)=pand tan(A-B)=q, then the value of tan2A, is

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  14. In a triangle ABC, sin A-cosB=cosC, then angle B, is

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  15. If theta lies in the first quadrant which of the following in not true

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  16. cos2 theta+2 costheta is always

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  17. The interior angles of a polygon are in AP The smallest angle is 120 a...

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  18. The maximum and minimum values of -4le5cos theta+3cos(theta+(pi)/(3...

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  19. sin36^@sin72^@sin108^@sin144^@=5/16

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  20. If A=tan6^0tan42^0 and B=cot66^0cot78^0 , then

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