Tuesday

September 23, 2014

September 23, 2014

Posted by **AJ** on Monday, September 23, 2013 at 4:20pm.

sin(x) = 1/3 and sec(y) = 29/21

, where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.)

cos(2y)

- Math -
**Steve**, Monday, September 23, 2013 at 5:31pmcos(y) = 21/29

cos(2y) = 2cos^2(y) - 1 = 2(21/29)^2 - 1 = 41/841

**Answer this Question**

**Related Questions**

Trigonometry help - If sin(x) = 1/3 and sec(y) = 13/12 , where x and y lie ...

cal - If sin(x) = 1/3 and sec(y) = 13/12 , where x and y lie between 0 and π...

Precalculus - Use one of the identities cos(t + 2πk) = cos t or sin(t + 2&#...

Math, please help - Which of the following are trigonometric identities? (Can be...

Calculus (math) - Using your knowledge of trigonometric identities, ﬁnd ...

Pre Calculus - Use one of the identities cos(t + 2šk) = cos t or sin(t + 2šk) = ...

Pre Calculus - Use one of the identities cos(t + 2šk) = cos t or sin(t + 2šk) = ...

Math - Evaluate *Note - We have to find the exact value of these. That I know to...

Trigonometry - How do I evaluate the trigonometric functions of the quadratic ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...