Question

Prove that
cos alpha + cos beta + cos gama + cos ( alpha + beta + gama) = 4 cos (alpha + beta /2) cos ( beta+ gama/2) cos ( gama+ alpha/2)

Answer 1

Answer:

Bhai its too lengthy........ sorry

Answer 2

hey frnd....send a pic of ur question so that we can understand easily.....

hope u understanding...

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