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The cosine of $300$ equals
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$derivdef\left(\tan\left(120\right)+\frac{-\cos\left(135\right)}{\frac{1}{2}}\right)$
Learn how to solve definition of derivative problems step by step online. Find the derivative of tan(120)+(-cos(135))/cos(300) using the definition. The cosine of 300 equals . The cosine of 135 equals . Multiply -1 times -\frac{\sqrt{2}}{2}. Divide \frac{\sqrt{2}}{2} by \frac{1}{2}.