Sunday

November 23, 2014

November 23, 2014

Posted by **Kim** on Wednesday, March 23, 2011 at 11:40am.

cos x + sin x tan x = sec x.

- Pre Calculus -
**Reiny**, Wednesday, March 23, 2011 at 12:09pmLS

= cosx + sinx(sinx/cosx)

= (cos^2x + sin^2x)/cosx , common denominator is cosx

= 1/cosx

= secx

= RS

**Answer this Question**

**Related Questions**

Pre-calc - Verify this identity. How would you prove it (sin^3(x)+cos^3(x))÷(1-...

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

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

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

Pre-Calculus - I don't understand,please be clear! Prove that each equation is ...

Pre-Calculus - Prove that each equation is an identity. I tried to do the ...

Algebra2 Verify Identity - Verify the Identity: csc(x)+sec(x)/sin(x)+cos(x)=cot(...

trigonometry hlp me - 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y...

Trigonometry - How do you verify the equation is an identity? Tan^2x-tan^2y=sec^...

calculus II - ∫ tan^2 x sec^3 x dx If the power of the secant n is odd, ...