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Mathematics, 23.11.2021 05:50 iicekingmann

The following diagram shows a right-angled triangle, ABC, where CosA=5/7 (a) Show that SinA=sqrt24/7
(b) Find cos 2A

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The following diagram shows a right-angled triangle, ABC, where CosA=5/7 (a) Show that SinA=sqrt24...

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