Question

One of the toughest races in the world is the 26.2-mile-long Boston marathon. After running 19 miles, Sheila James is exhausted. Find the percent of the race that she must still run.​

Answer 1

Answer:

Question

If A = 600 and B = 300, verify that

(i) sin (A + B) = sin A cos B + cos A sin B

(ii) cos (A + B) = cos A cos B – sin A sin B

(iii) sin (A – B) = sin A cos B – cos A sin B

(iv) tan (A – B) = (tan A – tan B)/ (1 + tan A tan B).

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Explanation:

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Answer 2

One of the toughest races in the world is the 26.2-mile-long Boston marathon. After running 19 miles, Sheila James is exhausted. Find the percent of the race that she must still run.

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