Seudónimo Seudónimo
  • 18-03-2020
  • Mathematics
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HELP PLEASE WILL AWARD BRAINLIEST

HELP PLEASE WILL AWARD BRAINLIEST class=

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PollyP52 PollyP52
  • 18-03-2020

Answer:

Below in bold.

Step-by-step explanation:

Tan ( - 5π/4)

= tan (-5π/ 4 + 2π)

= tan (3π/4)

= -1.

sec π/ 3

= 1 / cos π/3

= 1 / 0.5

= 2.

cos 31π/ 6

= cos  5 1/6 π

= cos (5 1/6 - 4) π  = 7π /6

= -√3/2.

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