Question
Tue September 17, 2013 By: Misbaah Raza

# Sin A = Cos A. Find 2Tan(sq)A + Sin(sq)A - 1.

Sun September 22, 2013
Given sinA = cosA
We know that sin 45 = cos45 = 1/ root2
Hence, A = 45 degrees

Therefore,
2tan2A + sin2A - 1
= 2tan245o + sin245o - 1
= 2(1) + (1/2) - 1
= 1 + 1/2
= 3/2
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