(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Construct the rhombus ABCD whose diagonals AC and BD are of lengths 8 cm and 6 cm respectively. Construct the inscribed circle of the rhombus. Measure its radius.

Using ruler and compass construct a cyclic quadrilateral ABCD in which AC = 4 cm, ∠ ABC = 60°, AB 1.5 cm and AD = 2 cm. Also, write the steps of construction.

(a) Only the ruler and compass may be used in this question. All contraction lines and arcs must be clearly shown and be of sufficient length and clarity to permit assessment.
(i) Construct a ABC, such that AB = AC = 7 cm and BC = 5 cm.
(ii) Construct AD, the perpendicular bisector of BC.
(iii) Draw a circle with center A and radius 3 cm. Let this circle cut AD at P.
(iv) Construct another circle, to touch the circle with center A, externally at P, and pass through B and C.

Solve: 2cos²θ + sin θ - 2 = 0.

In each of the following, determine whether the given numbers are roots of the given equations or not; x² – x + 1 = 0; 1, – 1

In each of the following, determine whether the given numbers are roots of the given equations or not; x² – 5x + 6 = 0; 2, – 3

In each of the following, determine whether the given numbers are roots of the given equations or not; 3x² – 13x – 10 = 0; 5, `(-2)/(3)`

In each of the following, determine whether the given numbers are roots of the given equations or not; 6x² – x – 2 = 0; `(-1)/(2), (2)/(3)`

If `sqrt(2)` is a root of the equation `"k"x^2 + sqrt(2x) - 4` = 0, find the value of k.

If a is a root of the equation x² – (a + b)x + k = 0, find the value of k.

If `(2)/(3)` and – 3 are the roots of the equation px²+ 7x + q = 0, find the values of p and q.

Find the discriminant of the following equations and hence find the nature of roots: 3x² – 5x – 2 = 0

Find the discriminant of the following equations and hence find the nature of roots: 2x²– 3x + 5 = 0

Find the discriminant of the following equations and hence find the nature of roots: 7x² + 8x + 2 = 0

Find the discriminant of the following equations and hence find the nature of roots: 3x² + 2x - 1 = 0

Find the discriminant of the following equations and hence find the nature of roots: 16x² - 40x +  25 = 0

Find the discriminant of the following equations and hence find the nature of roots: 2x² + 15x + 30 = 0

Discuss the nature of the roots of the following quadratic equations : x² – 4x – 1 = 0

Discuss the nature of the roots of the following quadratic equations : `3x^2 - 2x + (1)/(3)` = 0

Discuss the nature of the roots of the following quadratic equations : `3x^2 - 4sqrt(3)x + 4` = 0