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Prove that : (sin A )/(sin (90^(@) -A)) ...

Prove that `: (sin A )/(sin (90^(@) -A)) + (cos A )/( cos (90^(@) - A )) = sec A cosec A.`

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ICSE-REVISION PAPER -3 -SECTION - B
  1. Prove that : (sin A )/(sin (90^(@) -A)) + (cos A )/( cos (90^(@) - A )...

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  2. ABCD is a syclic quadrilateral with angle ADC =135^(@). Sides BA and C...

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  3. A right circular cone is 3.6 cm high and radius of its base is 1.6 ...

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  4. In GP.2,6,18,54……………13122, the product of 3 ^(rd) term from the beginn...

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  5. For the inter-state supply of the following godds/services, find the a...

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  6. Is the line through (-2,3) and (4,1) perpendicular to the line 3x =y +...

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  7. If the roots of the equation (b-c)x^2+(c-a)x+(a-b)=0 are equal, then p...

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  8. In a positive fraction, the denominator is greater than the numerator ...

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  9. Solve : (i) (x^(2)-x)^(2)+5(x^(2)-x)+4=0 (ii) (x^(2)-3x)^(2)-16(x^...

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  10. If -5 is a root of the quadratic equation 2x^2+p x-15=0 and the quadra...

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  11. There are three containers of equal capacity and all are completely fi...

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  12. A straight line passes through the points A(-5, 2) and B(3,-6). It int...

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  13. A straight line passes through the points A(-5, 2) and B(3,6). It inte...

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  14. A straight line passes through the points A(-5, 2) and B(3,6). It inte...

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  15. If (7a + 8b)/( 7c + 8d) = (7a - 8b)/(7c - 8d), prove that : a:b= c:d

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  16. If (7a + 8b)/( 7c + 8d) = (7a - 8b)/(7c - 8d), prove that : (i)a:b=c...

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  17. Calculate the ratio in which the line joining A(5, 6) and B(-3, 4) is ...

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  18. The speed of a boat in still water is 15 km/hr. It can go 30 km ups...

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  19. Prove that : sin A (1 + tan A) + cos A (1 + cot A) = sec A + cosec A.

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  20. If x in W, find the solution set of (3)/(5) x - ( 2x -1)/(3) gt1.

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  21. The figure alongside shows a circle with centre 0. Chord ED is paralle...

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