# CBSE Class 11-science Answered

**SIR PLEASE HELP ME WITH THIS QUESTIONS : 1. Find the equation of the tangent to the circle x^2+y^2=16 drawn from the point (1,4). 2. How many triangles can be formed by joining any 3 of the 9 points when i) no 3 of them are collinear? ii) 5 of them are collinear? 3. AB is a line of fixed length, 6 units, joining the points A(t,0) and B which lies on thepositive y axis. P is a point on AB distant 2 units from A. Express the coordinates of B and P in terms of t. Find the locus of P as t varies. 4. In a triangle ABC, (b^2 - c^2) / (b^2 + c^2) = sin(B - C) / sin(B + C), prove that it is either a right-angled or isoceles triangle.**

Asked by kandappan | 08 Feb, 2020, 11:29: AM

Expert Answer

1.

Equation of circle in the standard form is (x-h)

^{2}+ (y-k)^{2}= r^{2}Given equation of circle is x

^{2}+ y^{2}= 16
Answered by Renu Varma | 10 Feb, 2020, 11:24: AM

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