0

Guest

Courses New

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

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

Grade:10

1 Answers

kkbisht
90 Points
5 years ago
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

Think You Can Provide A Better Answer ?

Other Related Questions on Trigonometry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More