Correct or no? | Mathematics | Page 1

solid nexus May 7, 2023, 4:04 AM

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quasi anvilBOT May 7, 2023, 4:04 AM

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solid nexus May 7, 2023, 4:07 AM

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<@&286206848099549185> ?

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<@&286206848099549185> ?

solid nexus May 7, 2023, 4:41 AM

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<@&286206848099549185> ?

latent goblet May 7, 2023, 8:35 AM

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u still remember the CAST rule? it states that in quadrant 4, 1, 2, 3, cos, all, sin and tan are positive, respectively

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so in this case, cos terminates in quadrant 2, so its gonna be negative since cosine is positive in only quadrants 4 and 1

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in question 1, sine theta is 12/13, which is a right triangle with bases 12 and 5 (according to the pythagorean theorem) and a hypotenuse of 13

cosine is equal to adjacent over hypotenuse, which is 5/12

but since it's in quadrant 2 it's gonna be negative, so the answer is -5/12

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the same reasoning is applicable on all questions you provided

#Correct or no?