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Find the period of the following functio...

Find the period of the following function:
sin 2x.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
  1. In any quadrilateral ABCD, prove that: sin (A + B) + sin(C +D)=0.

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  2. Find all the values of theta satisfying 0lt theta lt pi and tan^2 the...

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  3. Find the period of the following function: sin 2x.

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  4. Find the period of the following function: cos 3x.

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  5. Find the period of the following function: tan 2x.

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  6. If A, B, C and D be the angles of a cyclic quadrilateral, taken in ord...

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  7. If x=(11 pi)/4, prove that : sin^2 x- cos^2 x+2 tan x- sec^2 x=1.

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  8. If 8 theta=pi, prove that cos theta+ cos 7 theta=0.

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  9. If B + C = 60^@, show that : sin (120^@- B) = sin (120^@ -C) .

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  10. Prove that : sin^2 frac (pi)(8)+ sin^2 frac (3pi)(8)+ sin^2 frac (5pi)...

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  11. Prove that : [1+ cot alpha- sec (pi/2+alpha)] [1+ cot alpha+ sec (pi/...

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  12. In any triangle ABC, prove that : sin (A + B) = sin C.

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  13. In any triangle ABC, prove that : cos frac (A+B)(2)= sin frac (C)(2).

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  14. In any triangle ABC, prove that : tan frac (B+C-A)(2)= cot A.

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  15. If cot A= tan (n-1) A, show that one value of A is pi/(2n).

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  16. Show that the function f(x) = cos 2x is periodic and find its period.

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  17. Show that the function f(x) = cos (x/2+pi/4) is periodic and find its ...

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  18. Evaluate : sin 15^@, cos 15^@, tan 15^@.

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  19. Evaluate : sin 75^@, cos 75^@, tan 75^@.

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  20. Prove that : sin 105^@ + cos 105^@=1/sqrt2.

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