3 years ago

Which of the following best explains the value of sinä on the u sual holnw?

Mathematics

1 answer:

kaheart [24]3 years ago

4 0

I think your answer is right

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How many times greater is the digit in the tens place than digit on the ones place in the number 55.72

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andreev551 [17]

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Step-by-step explanation:

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3 years ago

2^sinx+2^cosx find the minimum value of this trignometry

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3 years ago

If a and b are two angles in standard position in Quadrant I, find cos(a-b) for the given function values. sin a=3/5and cos b=12

goldfiish [28.3K]

The identity in question is

cos(a - b) = cos(a) cos(b) + sin(a) sin(b)

so that

cos(a - b) = 12/37 cos(a) + 3/5 sin(b)

Since both a and b lie in the first quadrant, both cos(a) and sin(b) will be positive. Then it follows from the Pythagorean identity,

cos²(x) + sin²(x) = 1,

that

cos(a) = √(1 - sin²(a)) = 4/5

and

sin(b) = √(1 - cos²(b)) = 35/37

So,

cos(a - b) = 12/37 • 4/5 + 3/5 • 35/37 = 153/185

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2 years ago