If sin θ = a² - b²/ a² + b² find the values of all the other trigonometric ratios

Can some one me, i’ve been asking for so long

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?