Question

if sinA =cosA, find the value of A?
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Answer 1

Step-by-step explanation:

A will be 1, because Sin A =root of (1-cos²A)

Answer 2

Answer:

A = 45°

Step-by-step explanation:

= > sinA = cosA

= > sinA / cosA = 1

= > tanA = 1

= > tanA = tan45°

= > A = 45°

Method 2 :

= > sinA = cosA

= > sinA = + √( 1 - sin^2 A)

= > sin^2 A = 1 - sin^2 A

= > 2 sin^2 A = 1

= > sin^2A = 1 / 2

= > sinA = 1 / √2

= > sinA = sin45°

Hence the required value of A is 45°.