17.73 Use Problems
Condition: Calculate the value of the expression: \ [\ sin \ frac {7 \ pi} {3} \ cdot \ tan \ left (-\ frac {13 \ pi} {6} \ right)+\ sqrt {2} \ cos \ left (-\ frac {5 \ pi} {4} \ right)-\ cot 13.5 \ pi \]
Problems of the Use (Unified state Exam) - Equations and Inequalites in Terms of A Parameter, Solved Both by Algebraic Methods and Geometric One.