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The cosine of $135$ equals $-\sqrt[4]{\frac{1}{4}}$

Learn how to solve trigonometric equations problems step by step online.

$-\sqrt[4]{\frac{1}{4}}=4\cos\left(\right)$

Learn how to solve trigonometric equations problems step by step online. Solve the equation cos(135)=4cos(). The cosine of 135 equals -\sqrt[4]{\frac{1}{4}}. The cosine of 315 equals \sqrt[4]{\frac{1}{4}}. Multiply -3 times \sqrt[4]{\frac{1}{4}}. Subtract the values 45 and -\frac{3}{\sqrt{2}}.

** Final answer to the problem

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