find the value of sin squre 20+sin square 70-tan squre 45
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sin(sq) 20 + sin(sq) 70 - tan(sq) 45
= sin(sq)20 + sin(sq) [90 - 20] - (1) sq [tan 45 = 1]
= sin(sq)20 + cos(sq) 20 - 1 [sin(sq)[90 - A] = cos(sq)A]
= 1 - 1 [Identity: sin(sq)A + cos(sq)A = 1]
= 0
so the ans is 0
= sin(sq)20 + sin(sq) [90 - 20] - (1) sq [tan 45 = 1]
= sin(sq)20 + cos(sq) 20 - 1 [sin(sq)[90 - A] = cos(sq)A]
= 1 - 1 [Identity: sin(sq)A + cos(sq)A = 1]
= 0
so the ans is 0
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