dAB

In the following figure (not to scale), angle DAB + angle CBA = 90^@ , BC = AD, AB = 20 cm, CD = 10 cm, then the area of the quadrilateral ABCD is: निम्नलिखित आकृति (जो पैमाने के अनुसार नहीं है) में, angle DAB + angle CBA = 90^@ , BC = AD, AB = 20 सेमी, CD = 10 सेमी है, तो चतुर्भुज ABCD का का क्षेत्रफल कितना होगा?

Let A, B, C, D be (not necessarily square) real matrices such that A^T=BCD: B^T=CDA; C^T=DAB and D^T=ABC. For the matrix S=ABCD , consider the two statements. I. S^3=S II. S^2=S^4 (A) II is true but not I (B) I is true but not II (C) both I and II are true (D) both I and II are false

Let A, B, C, D be (not necessarily square) real matrices such that A^T=BCD: B^T=CDA; C^T=DAB and D^T=ABC. For the matrix S=ABCD, consider the two statements. I. S^3=S II. S^2=S^4 (A) II is true but not I (B) I is true but not II (C) both I and II are true (D) both I and II are false

A circle passes through three points A, B and C with the line segment AC as its diameter. A line passing through A intersects the chord BC at a point D inside the circle.If angles DAB and CAB are alpha and beta respectively and the distance between the point A and the mid-point of the line segment DC is d, prove that the area of the circle is (pid^2cos^2a)/(cos^2alpha+cos^2beta+2cosalphacosbetacos(beta-alpha)

A circle passes through three points A, B and C with the line segment AC as its diameter. A line passing through A intersects the chord BC at a point D inside the circle.If angles DAB and CAB are alpha and beta respectively and the distance between the point A and the mid-point of the line segment DC is d, prove that the area of the circle is (pid^2cos^2a)/(cos^2alpha+cos^2beta+2cosalphacosbetacos(beta-alpha)

Let A, B, C, D be (not necessarily square) real matrices such that A^T=BCD: B^T=CDA; C^T=DAB and D^T=ABC. For the matrix S=ABCD , consider the two statements. I. S^3=S II. S^2=S^4 (A) II is true but not I (B) I is true but not II (C) both I and II are true (D) both I and II are false

Let A, B, C, D be (not necessarily square) real matrices such that A^T=BCD: B^T=CDA; C^T=DAB and D^T=ABC. For the matrix S=ABCD , consider the two statements. I. S^3=S II. S^2=S^4 (A) II is true but not I (B) I is true but not II (C) both I and II are true (D) both I and II are false

If a:b=c:d then (ma+nc)/(mb+nd) is equal to m:n b.d:cn c.an:mb d.a:b