Question

How
much the value of Sin2c+Cos2c​

Answer 1

Step-by-step explanation:

Use trig identity: sin2x−cos2x=−cos2x

Solve the equation:

- cos 2x = 0

Use trig unit circle:

a. cos 2x = 0 --> 2x=π2+2kπ --> x=π4+kπ

If k = o --> x=π4

If k = 1 --> x=π4+π=5π4

b. cos 2x = 0 --> 2x=3π2+2kπ --> x=3π4+kπ

If k = o --> x=3π4

If k = 1 --> x=3π4+π=7π4

Answers for (0,2π)

π4;5π4;3π4;7π4