Find the value of m such that m= cos 2x +sin 3x +tan 4x, where x = π by 2
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put value of x i.e pi/2 in equation
m=cos2pi/2 +sin3pi/2+tan4pi/2
m= cos180+sin270+tan360(pi/2=90degrees)
m= -1+(-1)+0
m=-2
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Answer:
-1 is correct answer
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