Math, asked by despecraj, 9 months ago

prove that (cos^2 48° -sin^2 12°=(√5+1)/8

Answers

Answered by sanjusairohit

2

Step-by-step explanation:

cos^A- sin^2B=cos(A+B)sin(A-B)

=cos60sin36

(1÷2)((√5+1)÷4)

=(√5+1)/8

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