How do i solve these trigonometric ?

find all solutions in the interval [0, 2π).

(sin x)(cos x) = 0

find all solutions in the interval [0, 2π).

cos2x + 2 cos x + 1 = 0

find all solutions to the equation.

cos2x + 2 cos x + 1 = 0

Solution are

i)

Step-by-step explanation:

1) (sinx)(cosx) =0

sin2x/2 =0

2x =0, 2pi, 3pi, 4pi

Hence

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2)

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the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.

it is not that hard all u have to do is plot the graph

step-by-step explanation: