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Please help me on this math homework.Its trigonometry identities.

Please help me on this math homework.Its trigonometry identities.-example-1
Please help me on this math homework.Its trigonometry identities.-example-1
Please help me on this math homework.Its trigonometry identities.-example-2

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Both questions solved

i hope its very useful for u

Please help me on this math homework.Its trigonometry identities.-example-1
Please help me on this math homework.Its trigonometry identities.-example-2
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