## bii17 Group Title 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 2 years ago 2 years ago

1. Gowthaman

3.487 ft^2/s

2. bii17

@Gowthaman the answer should be -1.75

3. Gowthaman

verified u r correct

4. Gowthaman

|dw:1348990342741:dw|

5. Gowthaman

|dw:1348990385745:dw|

6. Gowthaman

|dw:1348990451547:dw|

7. Gowthaman

|dw:1348990511691:dw|

8. bii17

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

9. bii17

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

10. bii17

@Gowthaman ???

11. Gowthaman

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

12. Gowthaman

|dw:1348991058732:dw|

13. Gowthaman

and sec 45 = 1.414