Math, asked by guptarashi0790p9lgj0, 11 months ago

Prove that
cos²(A-B) + cos²B - 2cos(A-B). cosA. cosB = Sin²A
class 11 Trigonometry..

Answers

Answered by singhgurpreet2060

1

Step-by-step explanation:

Here is your solution

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guptarashi0790p9lgj0: well thank you but i was able to solve it myself... :)

singhgurpreet2060: ok good

singhgurpreet2060: mark as brainliest i want only 3 brainliest to reach to next level

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