(sin A + cosA)2 + (sinA-cosA)2
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Answered by
4
Answer:
= 2sinA + 2cosA + 2sinA - 2cosA
= 4 sinA
Answered by
1
Step-by-step explanation:
(sinA + cosA)^2 + ( sinA - cosA)^2
= sin^2A +cos^2A + 2sinA cosA + sin^2A + cos^2A - 2sinA cosA
= 1 +1 ( sin^2A+ cos^2A= 1)
= 2
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