tan5°等于根号几tan30° cos30° cos45° tan45° cos60° tan60° tan90° cos90°分别等于根号几?
问题描述:
tan5°等于根号几
tan30° cos30° cos45° tan45° cos60° tan60° tan90° cos90°分别等于根号几?
答
tan5°等于根号几
tan30° cos30° cos45° tan45° cos60° tan60° tan90° cos90°分别等于根号几?