Learn how to solve problems step by step online. tan245^{\circ}- cos260^{\circ} = x sen 45^{\circ} cos 45^{\circ}tag 60^{\circ}. Math interpretation of the question. Simplify \sin\left(45\right)\cos\left(45\right)\tan\left(60\right)x using the trigonometric identity: \sin(2x)=2\sin(x)\cos(x). Multiply 2 times 45. The sine of 90 equals 1.

tan245^{\circ}- cos260^{\circ} = x sen 45^{\circ} cos 45^{\circ}tag 60^{\circ}