Math, asked by sonuk80024, 9 months ago

prove that-cos²A+cos²(A+120°)+cos²(A-120°)=3\2

Answers

Answered by Anonymous

2

Step-by-step explanation:

that-cos²A+cos²(A+120°)+cos²(A-120°)

use formula

cosA+cos(A+120°)+cos(A-120°)

= Cos3A/4

Previous Question

Next Question

Similar questions

Science, 5 months ago

Thanks ARMY ❣️ I Pulple you What is breathing????

Math, 5 months ago

A shopkeeper sells his goods at 10% profit. if he sells it at 20% profit, he get rs 120 more .find the CP?

Hindi, 5 months ago

"र" के कितने रूप होते हैं?

Math, 9 months ago

plzz solve sum no.4, a humble request plzz...

Math, 9 months ago

if 36kg of rice costs rs 180 find the cost of 1 Quintal of rice...

Biology, 11 months ago

please follow me write a notice on Lost watch...

English, 11 months ago

he said to me,"you were late". change it into indirect speech...

Math, 11 months ago

is ratio part of the syllabus for class 10th ICSE or only proportion is the part?? plz don't give silly answers if u don't know...