Friday

December 19, 2014

December 19, 2014

Posted by **eddy** on Wednesday, January 2, 2013 at 1:15pm.

10.Prove that 1+tanθ/1-tanθ = sec^2θ+2tanθ/1-tan^2θ

17.Prove that sin^2w-cos^2w/tan w sin w + cos w tan w = cos w-cot w cos w

23.Find a counterexample to shows that the equation sec a – cos a = sin a sec a is not an identity.

- trigonometry hlp me -
**Steve**, Wednesday, January 2, 2013 at 2:17pmyou gotta add some parentheses, so we can tell what's the numerator and what's the denominator.

For #23, just pick an easy value, like pi/4:

√2 - 1/√2 =?= 1/√2 * √2

No.

**Answer this Question**

**Related Questions**

Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...

Math - Calculus - The identity below is significant because it relates 3 ...

trignonmetry - 6. Prove that tan λ cos^2 λ + sin^2λ/sin λ = ...

trig help much appreciated! :)) - 1. Find the complete exact solution of sin x...

trigo math - 7. Prove that tan B sin B + cos B = sec B. 11. Prove that tan&#...

Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...

Trig - Verify the given equations: ____1______ + ____1_______ = -2 tanθ tan...

Trigonometry - Could someone please help me with the following q's I'm having ...

math - Prove the following identities: a) (cosec θ + cotθ)(cosecθ...

precalculus - For each of the following determine whether or not it is an ...