Answer: The correct option is (c). 
Step-by-step explanation: We are given to select the correct basic identity that we will use to verify the following:

We have

In order to verify the given trigonometric equation, we must have

Thus, the required identity that we will use is

Option (c) is CORRECT.
Answer:
first of all the answer should be A. the range of round 2 is greater than the round 1 range because first of all range is the subtraction of the maximinium and the lower number so 1 is for the round 1 range score and for the round 2 scores the range is 4.
5-4= 1 for round 1 range score
5-1=4 for round 2 range score.
B and c cannot be because the score for round 2 is lower and for round 1 the scores are more higher and option d also cannot be because there is overlap so option a is the correct answer and have a great day.
Step-by-step explanation: Hopefully that is the correct answer and please give me brainliest if you want.
The answer is 45°
By determining the angles of triangle ACB (A=30°, B=45°, C=105° (total of 180°)) and knowing that angle 1 correlates to angle 4 ((1)°=(4)°), we can find angle 1, which is 45°, equal to angle 4.
The answer is d.
The parallelogram is 2 times the height of the triangle.
Percentage of error by Clare is estimated as 4.1667 %
Height measured by Clare = 4 feet
Height measured by Doctor = 4 feet, 2 inches
Percentage error = ?
Percentage error = Difference/ Actual height *100
Percentage error = (2/ (4*12))*100
Percentage error = 4.1667 %
The accurate height is measured by Doctor, as he have more accurate measurement system.