if sinx=cosx find 2 tanx.tanx+sinx.sinx-1
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Answer:
if
sinx = cosx
sinx/cosx = 1
i:e tanx = 1
therefore we can say x = 45deg.
2.tanx.tanx+sinx.sinx-1=
= 2*1*1+sin(45).sin(45) - 1
= 2 + [(1/√2)*(1/√2)] -1
= 1 + 1/2
= 3/2
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