Ask Question
13 November, 06:25

Rewrite 1-2 sin ^2 (22.5∘) using a double-angle identity.

A. sin 45

B. sin 11.25

C. cos 11.25

D. cos 45

+5
Answers (1)
  1. 13 November, 06:47
    0
    Using the identity:

    Cos (2a) = 1-2 Sin^2 (a)

    Therefore : 1-2 sin ^2 (22.5∘) = Cos (2a)

    = Cos (2 * 22.5) = Cos 45
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Rewrite 1-2 sin ^2 (22.5∘) using a double-angle identity. A. sin 45 B. sin 11.25 C. cos 11.25 D. cos 45 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers