65 % (676 Review)
Let Î¸ represent an angle in the second quadrant such that sin (Î¸) = 4/5
a. ) What is cos (Î¸)? (for my answer I got cos (Î¸) = -3 / 5, but not sure if I'm right)
b. ) Find sin (Î¸ / 2) and cos (Î¸ / 2) [hard time with this question]
If you could give step by step help so I can practice this later, I would really appreciate it!
Get immediate access to 24/7 Homework Help, step-by-step solutions, instant homework answer to over 40 million Textbook solution and Q/A
Pay $7.00/month for Better Grades