Question

If cos A = sin 42°, then find the value of A.
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Answer 1

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Cos A=Sin42°

CosA=Cos(90-42)

CosA=Cos48

A=48°

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Answer 2

The value of A is 48°.

Step-by-step explanation:

Since we have given that

$\cos A=\sin 42^\circ$

As we know that

$\cos A=\sin(90-A)$

So, it becomes,

$\cos A=\sin (90-42)\\\\\cos A=\cos 48\\\\A=48^\circ$

Hence, the value of A is 48°.

# learn more:

If cos A = sin 42°, then find the value of A.​

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