Sin (B+2C)+ Sin (C+2A) + Sin (A+2B)=4 Sin (B-C)/2 Sin (C-A)/2). Sin (A-B/2. see class 10 opt math
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At the foot of a mountain, the angle of elevation of its summit is 45. After ascending 1 km
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Math for fun, sin(z)=2
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topic no 23 introduction of green function solve different green problem by @physicsv-vision
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Class 11 || Mathematics || Vector
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