Math, asked by Bhumika85795, 2 days ago

If cos0=5/13 ,then cos20=

Answers

Answered by CB7th

1

Answer:

-119/169

Step-by-step explanation:

cos20 = 2cos²0 - 1

= 2 (5/13)² - 1

= 50/169 - 1

= -119/169

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