Question 741216
if 7 sin square A + 3 cos square A=4 , find the value of sec A + cosec A
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{{{7sin^2(A)+3cos^2(A)=4}}}
{{{7(1-cos^2(A))+3cos^2(A)=4}}}
{{{7-7cos^2(A)+3cos^2(A)=4}}}
{{{-4cos^2(A)=-3}}}
{{{cos^2(A)=3/4}}}
cos(A)=√3/2
A=30º
sec(A)=2/√3=2√3/3
csc(A)=2