VI to have studied 65. (a) Choose (at random) an angle 0 such that 0° <0 <90°. 4. Then with this value of 0, use your calculator to verify that logio(sin 0) = 2 log10(sin 0). (b) For which values of 0 in the interval 0° <0s 180° is the equation in part (a) valid? 66. (a) Choose (at random) an angle 0 such that 0° <0< 90°. Then with this value of 0, use your calculator to verify that log1o(cos 0) = 2 log10(cos 0). (b) For which values of 0 in the interval 0° <0s180° is the equation in part (a) valid? For Exercises 67 and 68, let S(8) = sin 0 0< 360° = COS O L(x) = ln x %3D 67. What is the domain of the function (Lo S)(0)? 68. What is the domain of the function (L C)(0)? 69. (a) Choose (at random) an angle 0 such that 0° < 0 < 90°. Then with this value of 0, use your calculator to verify that In(sin 0) InV1 - cos e + InV1 + cos 0 = (b) Use the properties of logarithms to prove that if n '.06 > 0> .0 %3D Cos A + InV1 + cos 0 = In(sin 0)
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Number 67
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