sin60cos30+sin30cos60
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sin60cos(90-60) + sin30cos(90-30)
sin60sin60 + sin30sin30
(sin60)^2 + (sin30)^2
(√3/2)^2 + (1/2)^2
=>3/4 + 1/4 = 4/4 = 1
sin60sin60 + sin30sin30
(sin60)^2 + (sin30)^2
(√3/2)^2 + (1/2)^2
=>3/4 + 1/4 = 4/4 = 1
ryt 1
tq
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