Question

prove that sinx+sin3x ÷ cosx+cos3x=tan2x​

Answer 1

Answer:

Used Formulas -

1. sin C + sin D = 2 sin (C+D/2) cos(C - D/2)

2. cos C + cos D = 2 cos (C+D/2) cos(C-D/2)

3. sin x/cos x = tan x

Step-by-step explanation:

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