what is sin of 30 degrees, what is cos of 5(pie)/6, convert 7(pie)/6 radians to degrees, tan of 225 degrees, which angles is the sin >0, which angles is the sin<0, and which 2 angles are the sin and cos equal. PLEASE NEED HELP BADLY​

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step-by-step explanation:

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answer:

your answer is: c. 196 7/8 in^3.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

i need more details

step-by-step explanation: