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cot(45+theta)cot(45-theta)=...

`cot(45+theta)cot(45-theta)=`

A

` -1`

B

0

C

1

D

`oo`

Text Solution

Verified by Experts

The correct Answer is:
C
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES -COMPETITIVE THINKING
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  2. The value of t a nthetasin(pi/2+theta)cos(pi/2-theta) is -1 b. 1 c. ...

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  3. cot(45+theta)cot(45-theta)=

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  4. tan 75^(@) - cot 75^(@)=

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  5. Prove that tan 70^(@) = "tan " 20^(@) + 2"tan " 50^(@)

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  6. sec 50^(@) + tan 50^(@) is equal to

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  7. If 2 sec 2 alpha = tan beta + cot beta, then one of the values of alph...

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  8. The value of sin(pi+theta)sin(pi-theta)cosec^(2)theta is equal to

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  9. If A ,B ,C ,D are angles of a cyclic quadrilateral, then prove that co...

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  10. The value of cos(270^@+theta)cos(90^@+theta)-sin(270^@-theta)costheta ...

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  11. If A = pi/2 , cos A + sin (270^(@) -A)+ cos (180^(@) +A)=

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  12. tanA+cot(180^0+A)+cot(90^0+A)+cot(360^0-A)=

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  13. The valur of sin 1^(@)+ sin 2^(@)+…+ sin 359^(@) is equal to

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  14. The value of sin 600^(@) cos 330^(@)+ cos 120^(@) sin 150^(@) is

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  15. At x= (5pi)/(6), the value of 2 sin 3x+ 3 cos 3x is

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  16. (1- tan 2 ^(@) cot 62^(@))/(tan 152^(@) -cot 88^(@))=

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  17. (cos 12^(@) - sin 12^(@))/(cos 12^(@) + sin 12) + (sin 147^(@))/(cos 1...

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  18. If tan 20^(@) =lamda, then (tan 160^(@) -tan 110^(@))/(1+ (tan 160^(@)...

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  19. sin^2 17. 5^(@)+sin^2 72. 5^(@) is equal to

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  20. Find the value of the expression 3[sin^(4)((3pi)/(2)-alpha)+sin^(4)(...

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