plz tell the solution plz
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cos(45+30)
cos45.cos30-sin45.sin30
1/√2×√3/2-1/√2×1/2
√3/2√2-1/√2
cos45.cos30-sin45.sin30
1/√2×√3/2-1/√2×1/2
√3/2√2-1/√2
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