Question

If cos7a=sin (a-6) where 7a is an acute angle. Then find a

Answer 1

Cos7a =sin(a-6)

Sin(90-7a)= sin(a-6)

Therefore,

90-7a=a-6

Therefore

96=8a

a=96÷8=12

A=12

Step-by-step explanation:

Answer 2

HERE IS UR SOLUTION.....

cos 7a=sin (a-6)
sin(90-7a)=sin (a-6)
(cut sin)
90-7a=a-6
90+6=a+7a
96=8a
a=96/8
a=12

HOPE IT HELPS U.......