Question

if sine A=cosA then find the valu of A​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Sin A = Cos A

By squaring both side

Sin^2A - cos^2A = 0 .... (i)

Since sin^2A + cos^2A =1..... (ii)

Adding equation (i) & (ii), we get

2sin^2A =1

Sin^2A=1/2

SinA =1/root 2

A=sin^-1(1/root2)

Therefore A = pi/4 or 45°