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If A , B and C are interior angles of tr...

If A , B and C are interior angles of triangle ABC ,then show that sin ` ((B+C)/( 2) )=cos (A) /(2) `

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BEYOND PUBLICATION-TRIGONOMETRY-EXERCISE
  1. Express: sec 76^@ + cosec 52^@ in terms of angles between 0^@ and 45^@...

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  2. Express: tan 65^@ + cot 49^@ in terms of angles between 0^@ and 45^@

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  3. If A , B and C are interior angles of triangle ABC ,then show that sin...

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  4. If A , B and C are interior angles of triangle ABC ,then show that sin...

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  5. If tan theta + cot theta = 2, find the value of tan^2 theta + cot^2 th...

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  6. Show that (cot A + tan B)/(cot B + tan A) = cot A. tan B.

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  7. ((1+ sin theta - cos theta )/( 1+ sin theta + cos theta ))^(2)=

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  8. Show that (cot A - cos A)/(cot A + cos A) = ( cosec A - 1)/(1 + cosec...

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  9. show that 1 + (cot^2 theta/ (1 + cosec theta)) = cosec theta

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  10. show that (1 + cos theta - sin^2 theta)/[(1 + cos theta)sin theta] = c...

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  11. Show that (1 + sin theta)/ cos theta + cos theta / (1 + sin theta) = 2...

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  12. Prove that [(1 + tan^2 theta)cot theta]/(cosec^2 theta) = tan theta

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  13. Prove that (1 + sec theta) / sec theta = sin^2 theta /(1 - cos theta)

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  14. Prove that cos A/(1 - tan A) + sin A /(1 - cot A)= sin A + cos A

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  15. If 5 tan theta= 4, then the value of (5 sin theta - 3 cos theta)/(5 si...

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  16. The value of (2tan30^@)/(1+tan^2 30^@)=

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  17. The value of sin 45^@+cos45^@ is

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  18. tantheta is not defined when theta is

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  19. tan 135^@

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  20. sin (A-B) = 1/2, cos (A+B) = 1/2,0^(0)<A + B <90^(0), A>B అయిన A మరియు...

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