Option #2 • Show all of your work, make your solution organized! Determine the value(s) of a, to the nearest tenth of a unit. Make sure you label the vertices of the diagram so that you can refer to angles and side lengths appropriately. 40° 25 15

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Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.