Find the value of theta in which Sin 44 degree plus sin.theta is equal...
Explanation:
To find the value of theta in which Sin 44 degree plus sin.theta is equals to cos. 30 degree, we will use the trigonometric identities.
Sine and Cosine Identities:
Sine and Cosine are two of the six trigonometric functions that are used to relate the angles and sides of a right-angled triangle. The following are the sine and cosine identities that we will use to solve this problem:
- sin (a + b) = sin a cos b + cos a sin b
- sin (a - b) = sin a cos b - cos a sin b
- cos (a + b) = cos a cos b - sin a sin b
- cos (a - b) = cos a cos b + sin a sin b
Working:
Given, Sin 44 degree + sin.theta = cos. 30 degree
Using the sine and cosine identities mentioned above, we can rewrite the given equation as:
sin (44 + theta) = cos (90 - 30) = cos 60 = 1/2
Now, we will use the inverse sine function to find the value of theta:
sin^-1 (sin (44 + theta)) = sin^-1 (1/2)
44 + theta = 30 or 150
Therefore, the possible values of theta are:
- theta = 30 - 44 = -14
- theta = 150 - 44 = 106
However, we know that the range of sine function is between -1 and 1. Therefore, the value of theta cannot be negative. Therefore, the only possible value of theta is:
- theta = 106
Conclusion:
The value of theta in which Sin 44 degree plus sin.theta is equals to cos. 30 degree is 106 degrees.