Question

tan 5x + tan 3x/tan 5x -tan 3x
= 4 cos 2x cos 4x.
​

Answer 1

Answer:

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Answer 2

Answer:

sin5x/cos5x+sin3x/cos3x/sin5x/cos5x-sin3x/cos3x

sin5x.cos3x+sin3x.cos5x/sin5x.cos3x-cos5x.sin3x

sin(5x+3x)/sin(5x-3x)

sin8x/sin2x

2sin4xcos4x/sin2x

2×2sin2x.cos2x.cos4x/sin2x

4cos2xcos4x