Show that 2sin2x = 4 sin x cos x − cos x is true for x = π/2 .?

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Show that 2sin2x = 4 sin x cos x − cos x is true for x = π/2 .?

Science & Mathematics by Anonymous 2018-07-12 08:34:24

Social Science

Show that 2sin2x = 4 sin x cos x − cos x is true for x = π/2 .?

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Anonymous

For x=pi/2, LHS=2sin(pi)=0; RHS=4sin(pi/2)cos(pi/2)-cos(pi/2)=0-0=0 => LHS=RHS