Math, asked by vivek12321, 11 months ago

1. Find the value of
(i) cos 840°

Answers

Answered by hgjmnguku

0

Answer:

Step-by-step explanation:

cos(450+30)

cos 30 value

Answered by Anonymous

3

Answer:

hiii...

cos(840°) = cos (90° × 7 + 30°)

= sin 30°

= -1/2

= -0.5

Ans. = -0.5

hope it's helpful you......

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