Math, asked by podduturisampath037, 8 months ago

sintheta plus cos theta whole square plus sin theta minus cos theta whole square

Answers

Answered by vivekpnair11479

2

Answer:

2(sin²Ф +cos²Ф)

Step-by-step explanation:

⇒(sinФ+cosФ)²+(sinФ-cosФ)²

⇒⇒sin²Ф+cos²Ф+2sinФcosФ+sin²Ф+cos²Ф-2sinФcosФ

⇒⇒⇒2sin²Ф+2cos²Ф

⇒⇒⇒⇒2(sin²Ф+cos²Ф).

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