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`        The expression 4 cos^4  x - 2 cos2x - 1/2 cos4x when simplified reduces to:(1) 2/3(2) 3/2(3) -2/3(4) -3/2`
one year ago

Umesh Kumar Mandal
13 Points
```							Put x=30. Then we will get.=4.cos^4(30) -2 cos60 - 1/2 cos120 = 3/2 ans..after solving this equation.we will get ans as 3/2.....Thanks u from Umesh Kr Mandal, Inspector PO..Kolkata Customs.
```
one year ago
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### Course Features

• 31 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions