Math, asked by hemalatha44, 1 year ago

evaluate sin theta + cos theta whole square + sin theta minus cos theta whole square​

Answers

Answered by iamanupama14
1

Answer:

Step-by-step explanation:

⇒ ( sin Ф + cos Ф) ² - (cos Ф)²

⇒ (sinФ)² + (cosФ)² + 2(sinФ)(cosФ) - (cosФ)²

(sin²Ф + cos²Ф = 1)

⇒ 1 + 2 sinФcosФ - cos² Ф

⇒ 1 - cos²Ф + 2sinФcosФ

( 1 - cos²Ф = sin²Ф)

⇒ sin²Ф + 2sinФcosФ

⇒ sin²Ф + 2 sinФ

⇒ sinФ( sinФ + 2)

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