TT Evaluate the following expressions. Your answer must be an angle in radians and in the interval [-/2, /2]. Note that is already provided in the answer so you just have to write the appropriate multiple. E.g. if the answer is /2 you should write 1/2. Do not use decimal numbers. The answer should be a fraction or an integer. (a) tan (tan(/6)) = (b) tan (tan(5/4)) = (c) tan (tan(-7/4)) = TT TT