Question

the included angle of the two sides of constant equal length s of an isosceles triangle is (theta)
a) show that the area of the triangle is given by A = .5 s(squared) sin (theta). (Done)
b) if theta is increasing at the rate of .5 radian per minute, find the rates of change of the area when (theta)= pi/6 and (theta)/3
c) explain why the rate of change of the area of the triangle is not constant even though d(theta)/dt is constant.

Answer 1

which part you need help wid ?

Answer 2

in B and C

Answer 3

great ! so you derived the equation for Area of isosceles triangle

Answer 4

area = \(\frac{1}{2}b.h\)

= \(\frac{1}{2}s.h\)

you must have found h, by drawing an altitude to one of the known bases