3 years ago

Q6 Q19.) Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Mathematics

1 answer:

Greeley [361]3 years ago

3 0

Using sin(A+B) = sinAcosB + cosAsinB

sin20cos40 + cos20sin40 = sin(20+40) = sin60degree

= $\frac{ \sqrt{3}}{ 2}$

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jolli1 [7]

The question is an illustration of angles on a straight line

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<h3>How to determine the value of x</h3>

In the figure, angles 1 and 2 are angles on a straight line

Where:

Angle 1 = 4x - 8
Angle 2 = 3x + 10

So, we have:

$4x - 8 + 3x + 10=180$

Collect like terms

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Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Q6 Q19.) Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the expression.