ron_jay
- 81
- 0
Help needed to solve these:
1)what is the minimum value of the expression 9tan^2 \theta + 4cot^2 \theta ?
2)Prove that sin20.sin40.sin60.sin80 =3/16
1)what is the minimum value of the expression 9tan^2 \theta + 4cot^2 \theta ?
2)Prove that sin20.sin40.sin60.sin80 =3/16