Math, asked by nowrinparveen365, 3 months ago

tanA/2=3/2 and tanB/2=5/2 then cos (A+B)

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Answered by mahanteshgejji

0

use tan(A +B) = [tanA + tanB]/[1 - tanA tanB]

and cos 2A = 1 - tan²A/ 1 + tanA formulae

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