SOLUTION: Use the basic identities to change the expression to one involving only sines and cosines. Then simplify to a basic trigonometric function. (sin x) (tan x+ cot x) - Tha

Algebra ->  Trigonometry-basics -> SOLUTION: Use the basic identities to change the expression to one involving only sines and cosines. Then simplify to a basic trigonometric function. (sin x) (tan x+ cot x) - Tha      Log On


   



Question 1013584: Use the basic identities to change the expression to one involving only sines and cosines. Then simplify to a basic trigonometric function.
(sin x) (tan x+ cot x)
- Thank You :)

Found 2 solutions by fractalier, MathTherapy:
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
(sin x)(tan x + cot x) =
sin x(sin x/cos x + cos x/sin x) =
sin x((sin^2 x + cos^2 x)/sin x cos x) =
sin x(1/sin x cos x) =
1/cos x

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Use the basic identities to change the expression to one involving only sines and cosines. Then simplify to a basic trigonometric function.
(sin x) (tan x+ cot x)
- Thank You :)
sin x * (tan x + cot x)
sin+%28x%29+%2A+%28sin+%28x%29%2Fcos+%28x%29+%2B+cos+%28x%29%2Fsin+%28x%29%29 ------------ Substituting sin+%28x%29%2Fcos+%28x%29 and cos+%28x%29%2Fsin+%28x%29 for tan x and cot x, respectively


----- Cancelling sin x in numerator and denominator
%28sin%5E2+%28x%29+%2B+cos%5E2+%28x%29%29%2Fcos+%28x%29%29
1%2Fcos+%28x%29%29 ------- Replacing sin%5E2+%28x%29+%2B+cos%5E2+%28x%29 with 1
highlight%28highlight%28sec+%28x%29%29%29