Is this solution correct? If not, what step(s) are wrong? What are the correct steps?

1. Given tan 0 = and cos 0 > 0, find sin 0 and cos 0. Student's Solution: sin 0 Step 1: By the trigonometric quotient identity, tan 0 = cos 0 Step 2: Therefore, sin 0 = 3 and cos 0 = 4.1 , :rx 2. Find the amplitude and period of the function y = -51n 2 3 ' Student's Solution: . 2:: Step 1: For a function of the form 32 = a Sln(bx), the amplitude is [ill and the period is ? . 1 Step 2: The amplitude is = 3 . \"Ir- 2 Step 3: The period is T\" = 6. 3