Jaka jest wartość wyrażenia:
sin30 + cos45 - tg60 x cos30/tg30
sin30 + cos45 - tg60 x cos30/tg30=1/2+√2/2-√3*√3/2:√3/3=(1+√2):2-3/2*3/√3=(1+√2):2-9/2√3=(1+√2):2-9√3/6=0,5+0,5√2-1,5√3≈0,5+0,5*1,41-1,5*1,73≈0,5+0,705+2,595≈3,8
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sin30 + cos45 - tg60 x cos30/tg30=1/2+√2/2-√3*√3/2:√3/3=(1+√2):2-3/2*3/√3=(1+√2):2-9/2√3=(1+√2):2-9√3/6=0,5+0,5√2-1,5√3≈0,5+0,5*1,41-1,5*1,73≈0,5+0,705+2,595≈3,8