7.I studied trigonometry for a month. I sometimes dreamed about sine, cosine and tangent, about mysterious angles and concussed computations, but for all this I made no real progress. I could not self-teach trigonometry. But I knew someone who had.
我学习
一
月的三角学。我有时会梦见正弦、余弦和正切,梦见神秘的角度和让我绞尽脑汁的计算,尽管如此,我并未取得任何实质性进展。我无法自学三角学,但我认识一
自学成功的人。