Question

7sinsquareA+3cossquareA=4 then0<A<90​

Answer 1

Answer:

sorry I don't now answer

Step-by-step explanation:

hello

Answer 2

Answer:

a=30 degrees

Step-by-step explanation:

$7sin^{2} a+3 cos^{2} a = 4\\4sin^{2} a =1\\sin^{2} a= 1/4\\ sina^{2} = sin^{2} 30\\a=30 degrees$

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