Find sin (a+b) when sina=(3/5) with 90 degrees < a < 270 degrees, and if cosb=(8/17) with 0 degrees < b< 180 degrees

Recall the compound angle identity:

, so we expect , and , so we expect . Then by the Pythagorean identity,

Then

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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step-by-step explanation: