Question 21 10 pts From the top and bottom of a 74 ft lighthouse, the angles of depression of a ship are 41 degrees and 37 degrees respectively. Find the height of the lighthouse above the sea level. Write your answer to two decimal places. 10 pts Question 22 If sin A = 4/5, A in QIl and cos B = -24/25, B in QIII. Find the exact value of cos(A+B). Write your answer in fraction form (in lowest %3D term)
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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