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heidiheffron574
22.09.2019 •
Mathematics
If sin a = 0.31, cos a = 0.95, sin b = 0.47, and cos b 0.88, what is sin(a+b)?
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Ответ:
option B
0.72
Step-by-step explanation:
Given in the question,
sin A = 0.31
cos A = 0.95
sin B = 0.47
cos B = 0.88
To solve sin(A+B) we will use trigonometry identities
Compound-angle formulae
sin(A + B) = sin A cos B + cos A sin BPlug values in above formula
(0.31) (0.88)+ (0.95) (0.47)
0.2728 + 0.4465
0.7193
≈ 0.72
Ответ:
0.72
Step-by-step explanation:
Use the sum formula for the sine function:
sin (A + B) = sin A cos B + cos A sin B
Insert the givens into the above formula:
sin (A + B) = (0.31)(0.88) + (0.95)(0.47)
= 0.7193, or approx 0.72
Ответ: