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If A, B, C, D are angles of a cyclic qu...

If `A, B, C, D` are angles of a cyclic quadrilateral then P.T `sin A - sin C = sin D - sin B`.

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SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Trigonometric Ratios, Transformations)
  1. For what values of x in the first quadrant (2 tan x)/( 1- tan ^(2) x) ...

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  2. If A, B, C are angles of a cyclic quadrilateral prove that cos A+ cos...

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  3. If A, B, C, D are angles of a cyclic quadrilateral then P.T sin A - s...

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  4. If alpha , beta are complementry angles such that bsin alpha = a, the ...

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  5. Find the expansion of sin(A+B+C).

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  6. Prove that sin ^(2) ((pi)/(8)+(A)/(2)) - sin ^(2) ((pi)/(8) - (A)/(2))...

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  7. Express cos^(6)A + sin^(6)A interms of sin 2A.

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  8. Simplify tan ((pi)/(4) +A) tan ((pi)/(4)-A)

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  9. Prove that tan 3A. tan2A.tanA = tan3A - tan 2A - tan A

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  10. Find tan 20^(@) + tan40^(@) + sqrt(3)tan20^(@)tan40^(@).

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  11. Prove that (sin theta + sin 2 theta )/(1+cos 0 + cos 2 theta )= tan th...

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  12. Express (1-costheta+sin theta)/(1+cos theta + sin theta) in terms of t...

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  13. Simplify (cot 55^(@)cot35^(@)-1)/(cot55^(@)+cot35^(@))

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  14. Express ((sqrt(3)cos 25^(@)+sin25^(@)))/(2) as a sine of an angle.

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  15. Expres sqrt3 sin 0 + cos 0 as a sine of an angle .

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  16. Express (cos theta - sin theta) as a cosine of an angle.

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  17. Express tan theta in terms of tan alpha, if sin (theta + alpha) = cos ...

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  18. Evaluate 6 sin 20^(@) - 8 sin^(3)20^(@).

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  19. Prove that (sin70^(@)-cos40^(@))/(cos50^(@)-sin20^(@)) = 1/(sqrt(3)).

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  20. Prove that sin 78^(@) + cos132^(@) = (sqrt(5)-1)/(4).

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