Find the approximate value of each trigonometric function. Given that sine = 0.519 where 0 < 0 < pi/2, find cos0. If necessary, round to 3 decimal places.
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Since 0 lies in Quadrant I, where cos0 > 0, cos0 is approximately ?

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

answer: what in the world is this

step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.