Question

tan 65-2 tan 40 + $\sqrt{3}$=

please solve this

Answer 1

Answer:

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Step-by-step explanation:

tan 65 - tan 40 = tan 25 + tan 40 . using tanA - tan B =sin(A - B)/cosAcosB and tanA + tan B = sin( A + B)/cosAcosB we get :: to prove sin 25/ cos 65 = sin 65 / cos 25 sin 25 = cos (90 - 25) = cos 65 and sin 65 = cos (90 - 65) = cos 25