Recall {{MATH_7}} means that {{MATH_8}} and {{MATH_9}}. Implicitly differentiating with respect {{MATH_10}} we see {{ENV_11}} While {{MATH_12}}, we need our answer written in terms of {{MATH_13}}. Since we are assuming that {{MATH_14}} consider the following triangle with the unit circle: {{CMD_15}} {{ENV_16}} {{CMD_17}} From the unit circle above, we see that {{ENV_18}} Recall, {{MATH_19}} on the interval {{MATH_20}}.{{CMD_21}} To be completely explicit, {{MATH_22}} {{CMD_23}} {{CMD_24}}