Math, asked by mnaik3224gmailcom, 11 months ago

Prove that cos 20° cos 40° - sin 5° sin 25º = 13+1.

mnaik3224gmailcom: not correct answer

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Answered by riteish9797

0

Answer:

it should be sin 40 degree

mnaik3224gmailcom: no.....

mnaik3224gmailcom: not correct answer

riteish9797: ok sorry that was my guess

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