Week 9 test

1.

Establish the identity. 2 cotu - tan u + 1 =3 cos zu cotu + tan u Write the left side in terms of sine and cosine. + 1 (Do not simplify.) Write the expressions in the numerator and denominator from the previous step as single quotients with the common denominator. sin u cos u + 1 sin u cos u Simplify the fraction from the previous step by canceling the common factors. The fraction from the previous step then simplifies to 3 cos zu using what? O A. Cancellation Property (used twice)O B. Cancellation Property and Pythagorean Identity O c. Reciprocal Identity O D. Reciprocal Identity and Quotient Identity O E. Pythagorean Identity (used twice)1 - ( sin 0- cos 0)( sin 0 - cos 0) Multiply and simplify sin Ocos 0 1 - (sin 0- cos 0)( sin 0- cos 0) = sin Ocos 0 (Use integers or fractions for any numbers in the expression.)Solve the equation. 2+25in8=4c0526 {I} What is the solution in the interval 0 slide 211:? Select the correct choice and fill in any answer boxes in your choice below. '9.) A- The solution set is { }. (Simplify your answer. Type an exact answer. using II.' as needed. Type your answer in radians. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) [I] B. There is no solution. Find the exact value of the expression. sin (25\") cos (20\") + cos {25} sin (20) r:3 sin (25\") cos (20\") + cos {25} sin [20] : E [Type an exact answer, using radicals as needed. Use integers er fractions for any,r numbers in the expression.) Express the given sum or difference as a product of sines and/or cosines. cos 20+ cos 60 cos 20 + cos 60 = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)Solve the equation on the interval 0 = 0