Suppose sin a + cos b = -0.2 while sin b + cos a = 1.6. What is the value of sin(a+b)?

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step-by-step explanation:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,