If cos x cos 2x cos 3x – sin x sin 2x sin 3x = 1/2
then which of the following can hold good?
(One or more options may be correct)
(A) sin 2x – cos 4x = 0 (B) sin 4x – cos 2x = 0
(C) sin 2x + cos 2x = 0 (D) sin 2x – cos 2x = 0
Answers
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4
Step-by-step explanation:
sinx+sin2x+sin3x= cosx+cos2x+ cos3x if. ... sinx+sin2x+sin3x=cosx+cos2x+cos 3x if ... `(sin3x+sinx)sinx + (cos3x-cosx)cosx=0 . play ... ( cos 4x + cos 3x + cos 2x )/( sin ...
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2
Answer:
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