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Trigonometric Identities

question 1 of 2 Grade: Ten - G10

Q: Verify the identity: sin²x + cos²x = 1 for x = 45°.

Did You Know?

The correct answer is 'HAS LIVED'. This is PRESENT PERFECT tense. We use present perfect for actions that started in the past and continue to the present, or for past actions with present relevance. Structure: have/has + past participle. Example: 'I have known her for ten years' (and I still know her now). 'Since 2010' indicates the action started in the past and continues now.

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Did You Know?

The correct answer is 'HAS LIVED'. This is PRESENT PERFECT tense. We use present perfect for actions that started in the past and continue to the present, or for past actions with present relevance. Structure: have/has + past participle. Example: 'I have known her for ten years' (and I still know her now). 'Since 2010' indicates the action started in the past and continues now.

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