Aubreyzavala Aubreyzavala

25-06-2018
Mathematics

contestada

Cos(3pi/4)= HELLPPPP

Cos3pi4 HELLPPPP class=

Respuesta :

mkryukova19 mkryukova19

25-06-2018

3π/4 angle is in the second quadrant, so cos (3π/4) is going to be negative.

Reference angle of 3π/4 is (π - 3π/4) = π/4

cos(π/4) = √2/2

cos (3π/4) = - √2/2

Answer is C.

Answer Link

kobaidchannell kobaidchannell

28-01-2022

Answer:

Answer C: negative square root of 2 over 2

Step-by-step explanation:

The reason being that the reference is pi over 4.

Answer Link

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