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Grade: 12
        
solve for x 
cos^-1(x) + sin^-1(x/2) = pi/6
3 years ago

Answers : (1)

Sher Mohammad
IIT Delhi
askIITians Faculty
174 Points
							take sin for both sides,
sin(cos^-1(x) + sin^-1(x/2) )= sin(pi/6)
sin(cos^-1(x))cos(sin^-1(x/2))+sin(sin^-1(x/2) ))cos(cos^-1(x))=.5
sqrt(1-cos(cos^-1(x)))^2)sqrt(1-sin(sin^-1(x/2)))^2)+x^2/2=.5
sqrt(1-x^2)sqrt(1-(x/2)^2)+x^2/2=.5
now , solve for x

sher mohammad
b.tech, iit delhi

3 years ago
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