Question

prove that sin3x+sinx /cos3x+cosx =tan2x.
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Answer 1

Answer:

Step-by-step explanation:

REFER ATTACHMENT

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

MARK BRAINLIEST

Answer 2

Answer:

Step-by-step explanation:

REFER THE ATTACHMENT

MARK BRAINLIEST