sec(arcsin(3/4))怎么解答
问题描述:
sec(arcsin(3/4))怎么解答
答
令arcsin(3/4)=α,
则,sinα=3/4.
cosα=√(1-sin^2α)=√7/4,
secα=1/cosα,
=1/(√7/4),
=4√7/7,
∴sec(arcsin(3/4)=4√7/7.