The answer is 150 because 6 times 25.60 equals 153.6
C) 250 is the right answer
Answer:
Step-by-step explanation:
Given
Required
The equivalent expression
We have:
Expand
Further expand
Apply laws of indices
Step-by-step explanation:
1.
Therefore,
2.
Use the identity
We chose the negative value of the cosine because of the condition where cot y > 0. Otherwise, choosing the positive root will yield a negative cotangent value. Now that we know the sine and cosine of y, we can now solve for the tangent:
3. Recall that sec x = 1/cos x, therefore cos x = 5/6. Solving for sin x,
Solving for tan x: