Posted by **yoshi** on Sunday, December 16, 2012 at 1:27pm.

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

= cos λ + sin λ

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.

## Answer this Question

## Related Questions

- trigo math - 7. Prove that tan B sin B + cos B = sec B. 11. Prove that tan&#...
- Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...
- trigonometry hlp me - 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y...
- Math - Calculus - The identity below is significant because it relates 3 ...
- trig help much appreciated! :)) - 1. Find the complete exact solution of sin x...
- Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...
- Physics - Which of the following equations describes the condition for observing...
- Physics - Which of the following equations describe the condition for observing ...
- precalculus - For each of the following determine whether or not it is an ...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

More Related Questions