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

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

A

`-1`

B

0

C

1

D

`1/2`

Text Solution

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The correct Answer is:
B
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Find the values of: (i) tan (-30^(@)) (ii) sin 120^(@) (iii) sin 135^(@) (iv) cos 150^(@) (v) sin 270^(@) (vi) cos 270^(@)

Let a=cos 0^@ sin² 270^@ - 2 cos 180^@ tan 45^@b=3 sin 180^@ *sec 180^@ + 2 cosec 90^@ - cos 360^@c=2 sec^2 pi cos 0^@ + 3 sin^2 (3 pi)/2-cosec pi/2 and d= tan pi cos (3 pi)/2+ sec 2 pi - cosec (3 pi)/2Find the value of (a+b+c+d).

What is the value of [sin (90 - A)+ cos (180-2A)]//[cos (90 - 2A) +sin (180 - A)] ? [sin (90 - A)+ cos (180-2A)]//[cos (90 - 2A) +sin (180 - A)] का मान क्या है?

Find the value of (i) cos(-30^(@)) " " (ii) sin 120^(@) " " (iii) sin135^(@) " " (iv) cos 120^(@)" " (v) sin270^(@) " " (vi) cos270^(@)

((sin ^ (2) a sin ^ (2) b + sin ^ (2) a cos ^ (2) b + cos ^ (2) a) + (sin ^ (2) (2 pi + a) + cos ^ (2) (6 pi-a) +1)) / (sin ^ (2) ((pi) / (3) -4 pi) + cos ^ (2) (8 pi + (pi) / (3)) +2))

TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES -COMPETITIVE THINKING
  1. If A ,B ,C ,D are angles of a cyclic quadrilateral, then prove that co...

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

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

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

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

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

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

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  8. (1- tan 2 ^(@) cot 62^(@))/(tan 152^(@) -cot 88^(@))=

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

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

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

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

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  13. sin^(2)5^@+sin^(2)10^@+sin^(2)15^@ +.......+sin^(2)85^@ + sin^(2)90^@=

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  14. cos 15^(@)

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  15. Which one of the following number (s) is/are rational?

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  16. The vlaue of 1/8(3-4cos 2 theta + cos 4 theta) is

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  17. If 0 lt x lt (pi)/(4), then sec 2x - tan 2x=

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  18. sqrt3 cosec 20^(@) -sec 20^(@)= (sqrt3)/(sin(20^(@)))-(1)/(cos (20^(...

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  19. The value of tan (1^0) + tan(89^0) is

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  20. If cot ""(2x)/(3) + tan (x/3) = cosec (kx)/(3), then the value of k is

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