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rusak2 [61]
3 years ago
8

HELPP ME PLZ IM VERY CONFUSED

Mathematics
1 answer:
Illusion [34]3 years ago
6 0
1st answer none of the above. these are the same angle and have sin of -1

#66 true -360° is the same as+360° and sin here is 0

67. true

68 neither. cos is -1 at 180 and -180

69 false, tan is undefined there

70 undefined

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8 0
2 years ago
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Factor 1.21a^6+22a^3+100
Monica [59]

Answer:

\frac{1}{100} (11 {a}^{3} + 100)(11 {a}^{3} + 100)

Step-by-step explanation:

1.21 {a}^{6}  +  22 {a}^{3}  + 100 \\  = 1.21 {a}^{6}  +  11 {a}^{3}  +  11 {a}^{3}+ 100 \\  = 11 {a}^{3} (0.11 {a}^{3}  + 1) + 100(0.11 {a}^{3}  + 1) \\  = (0.11 {a}^{3}  + 1) (11 {a}^{3} + 100) \\  = ( \frac{11}{100}  {a}^{3}  + 1) (11 {a}^{3} + 100) \\ =   ( \frac{11{a}^{3}  + 100}{100}  ) (11 {a}^{3} + 100) \\  =  \frac{1}{100} (11 {a}^{3} + 100)(11 {a}^{3} + 100) \\ are \: the \: required \: factors.

4 0
3 years ago
Pls help me I don’t know
pochemuha

All angles of a triangle sums up to 180 degrees

a° = 3a + 90 = 180°

   3a = 180 - 90

   3a = 90

     a = 90÷3

     a = 30°

b = 180-(25+90)

b = 180 - 115

b = 65°

<em><u>PLEASE MARK THIS ANSWER THE BRAINLIEST</u></em>

8 0
2 years ago
Read 2 more answers
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