Math, asked by uffi7git, 11 months ago

cos 18 °+ cos 162°+ sin 126° + sin 234°= ?​

Answers

Answered by kssaisasidhar
4

Answer:

Step-by-step explanation:

cos 162 = cos( 180 - 18 )

cos 162 = - cos 18

sin 126 = cos( 90 + 36)

sin 126 = - cos 36

sin 234 = cos(270 - 36)

sin 234 = - cos 36

cos 18 - cos 18 - cos 36 -cos 36

-2cos 36

-2(0.8090)

-1.6180

Answered by kishorestr2
5

Answer:

Step-by-step explanation:

Cos18 + Cos (180 - 162) + Sin126 + Sin(360 - 234)

Cos18 - Cos18 + Sin126 - Sin126 = 0

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