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4 is the answer of the question follow me for more concept
bhuvan70:
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Answer:if sinβ+cosβ is√2,it means that β is π÷4 so both sin and cos are√2÷2 and sin×cos is 0.5
- sinα=√2÷2 2.cosα=√2÷2
- √2×√2×2=4
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