Math, asked by yashi8697, 1 year ago

Cos(42) + cos (78)+ cos (162)=?

Answers

Answered by atul30102004

1

Answer:

Step-by-step explanation:

cos(42º)+cos(78º)+cos(162º)=??

0.74314482+0.20791169+(-0.95105651)=??

(0.74314482+0.20791169)+(-0.95105651)=??

(0.95105651)+(-0.95105651)=0

gopichand1860: how it is 0

gopichand1860: i want trigonometry explanation

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