## anonymous 3 years ago the base of an isosceles triangle is 10 ft long and the base angles are decreasing at a rate of 2 degree per secnd. find the rate of change of the area when the base angles are 45 degree

1. anonymous

3.487 ft^2/s

2. anonymous

@Gowthaman the answer should be -1.75

3. anonymous

verified u r correct

4. anonymous

|dw:1348990342741:dw|

5. anonymous

|dw:1348990385745:dw|

6. anonymous

|dw:1348990451547:dw|

7. anonymous

|dw:1348990511691:dw|

8. anonymous

where did u get $d \theta / dt = - \pi/90$

9. anonymous

@Gowthaman how will you siimply this.. 25 sec^2 45

10. anonymous

@Gowthaman ???

11. anonymous

u told rate of change of angle is 2 degrees, then

12. anonymous

|dw:1348991058732:dw|

13. anonymous

and sec 45 = 1.414