Question

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

Answer 1

Answer:

Cos A = sin 42°

Cos A = sin (90- 48°)

Cos A = cos 48°

=> A = 48 °

Answer 2

The value of A is 48°

Step-by-step explanation:

given :

cos A = sin 42°

we know that

sin (90 - A ) = cos A

therefore

cos A = sin (90-48°)

cos A = cos 48°

thus

A = 48°

hence , the value of A is 48°

#Learn more:

Find the value of cos 42-sin 48

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