what is the value of "theta" ?
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sin(theta)+cos(theta)=√2
[sin(theta)+cos(theta)]²=2
sin²(theta)+cos²(theta)+2sin(theta)cos(theta)= 2
1+2sin(theta) cos(theta)=2
2sin(theta)cos(theta)=2-1
sin2(theta)=1
2(theta)= 90
theta= 45°
[sin(theta)+cos(theta)]²=2
sin²(theta)+cos²(theta)+2sin(theta)cos(theta)= 2
1+2sin(theta) cos(theta)=2
2sin(theta)cos(theta)=2-1
sin2(theta)=1
2(theta)= 90
theta= 45°
tsn20:
2 sin(theta)× cos (theta) =1 , then sin(theta) × cos (theta) = 1/2
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