In the figure above, if the measure of ∠1 is not equal to the measure of ∠4, then the cosine of which of the following is equal to the sine of ∠1 ?

If 𝑡 is a real number and 𝑃=(𝑥,𝑦) is a point on the unit circle that corresponds to 𝑡, then 𝑥 is the sine of 𝑡 and 𝑦 in the cosine of 𝑡.Group of answer choicesTrueFalse

In the figure below, 𝐴𝐵― is parallel to 𝐷𝐸―, the measure of ∠𝐴𝐵𝐶 is 49°, and the measure of ∠𝐵𝐶𝐷 is 137°. What is the measure of ∠𝐶𝐷𝐸 ?

. If the measure of  𝜃=3𝜋4 radians , then what is the measure of 𝜃 in degrees?

Select all the correct answers.If the measure of angle is 𝜃  is 7⁢𝜋4 , which statements are true? The measure of the reference angle is 60∘ . The measure of the reference angle is 30∘ . sin(𝜃)=-22 The measure of the reference angle is 45∘ . cos(𝜃)=-22 tan(𝜃)=-1

(b)If ∠1 and ∠2 are complementary angles, then one of them must have a measure greater than 45°.=Counterexample:m∠1=, °m∠2°