Saved Bookmarks
| 1. |
cosec^2*(((7*pi)/6)*cos(pi/3)^2) %2B 2*sin(pi/6)^2=3/2 |
|
Answer» To prove: 2sin²π/6 +cosec² 7π/6 cos²π/3=3/2 Solution:2sin²π/6 +cosec² 7π/6 cos²π/3 =2sin²30°+cosec² 210 cos ²60° =2(1/2)²+(-2)²(1/2)² =(1/2) + 1 =(1+2)/2 =3/2 RHS Hence proved |
|