Question

solve cos°40A=sin°50A then find the value of A

Answer 1

cos40°A = sin50°A
cos(90° - 50°)A = sin50°A
sin50°A = sin50°A
So that A can be any value.....

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Answer 2

Cos 40 A° = Sin 50 A°

We know that Cos A = Sin (90-A)

Cos (90-50 A)° = Sin 50 A°

Sin 50 A° = Sin 50 A°
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And so A can be of any value as they are independent of the values.
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