Simply (tan^2 x - sec^2 x)(sin^2 x + cos^2 x)

we can use pythagorean identieis

remember that

also remember that and

so if we take and divide both sides by we get

subtracting from both sides

now subsitute into original problem

the answer is -1

i want to die

what the hell man, i just want the points lol

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.