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        If A is acute and Sec squareA+secA=6,then find value of A
one year ago

kkbisht
90 Points
							solution:            Given Trig- Equation can be written as  1/cos2A   + 1/CosA  =6 => 1+CosA=6Cos2A  => 6Cos2A-CosA-1=0 => (3CosA +1).(2CosA-1)=0  => either 2CosA-1=0 or 3CosA=-1  But A is given to be acute angle =>CosA will be positive  => 2CosA-1=0 => CosA=1/2 => A=60 degree or $\pi$/3 radian kkbisht

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