Question

Let cos y = .98. Which is csc y?

A. .5
B. 5.05
C. 5
D. 5.5

Answer 1

what is sin y?

Answer 2

i wasnt given that. @souvik

Answer 3

cosec y=1/sin y
so we have to find sin y first...

Answer 4

??

Answer 5

\[\sin ^{2}y=1-\cos ^{2}y=1-.98^{2}=\left( 1+.98 \right)\left( 1-.98 \right)=1.98*.02\]
=.0396
\[\sin y=\pm \sqrt{.0396},\csc y=\pm \sqrt{\frac{ 1 }{.0396 }}\]

Answer 6

well done.......!