If cos3a=sin(a-22°) ,where 3a & (a-22°) are acute angles find a

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asked Jun 1, 2018 112k views

2 votes

If cos3a=sin(a-22°) ,where 3a & (a-22°) are acute angles find a

Mathematics
high-school

Knickedi asked

by Knickedi

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7 votes

since they are acute, they lie in first quadrant
how to check that they are correct??
Substitute a=28 into the equation
cos(3*28)=0.104...
sin(28-22)=0.104
hence it is correct

If cos3a=sin(a-22°) ,where 3a & (a-22°) are acute angles find a-example-1

Nasgar answered Jun 6, 2018

by Nasgar

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