# Thread: Cofunction Identity Question

1. ## Cofunction Identity Question

Given that secb=csc0.64 and that b lies in the first quadrant, use a cofunction identity to measure angle b,to two decimal places. I dont know how to solve it. Please any hints?

2. Use the identity $\sec(b) = \csc(\frac{\pi}{2} - b)$.

3. ok so I did this
since csc=0.64
secb=0.64(pi/2-b)

=1.0053-b
im stuck! help!

4. $\csc(0.64) = \csc(\frac{\pi}{2} - b)$

Hence, $\frac{\pi}{2} - b = 0.64$

Solve for b!

,

# given that sec b=csc0.64 and b lies on first quadrant

Click on a term to search for related topics.