Answers

2014-10-01T12:34:01+05:30

given cos7A=sin(A-6)

sin(90-7A)=sin(A-6)

since (90-7A) and (A-6) ARE BOTH ACUTE ANGLES

THEREFORE

90-7A=A-6

8A=96

A=12 DEGREES

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sin(90-7A)=sin(A-6) it is correct. correct your answer in second line
ok now it is correct
2014-10-01T15:04:21+05:30
Given
      cos7A=sin(A-6)
since 7A is an acute angle
sin(90-7A)=sin(A-6)
       90-7A=A-68               
             A=96               
             A=12 degrees

0
there is only one answer
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