| 释义 |
- 1
OK, so if I change theta a little bit in this one, if I change theta a little bit and I keep a the same, then b has to change also in some way. 如果我在这里稍微改变θ的话，如果我稍微改变θ，同时a保持不变，那么b也会在某种程度上变化。 - 2
So, we set this to be zero. Theta, well, we are very happy because we want to express things in terms of theta. 所以我们令它等于零，很好，我们很高兴，因为我们就是想用θ来表示。 - 3
It depends on a and theta. And so, the area depends on theta, not only because theta is in the formula, but also because b changes, and b is in the formula. 它依赖于a和θ，因此面积依赖于θ,不仅因为theta在公式之中，也因为b改变，并且b在公式之中。
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