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1/1-cos x
+
1/1+cos x

Sagot :

Answer:

2 csc^2 x

Step-by-step explanation:

using a common denominator, that is

((1+cosx)+(1-cosx))/(1-cos^2c) = 2/sin^2x

Answer:

sin^2x

Step-by-step explanation:

(1+cosx)(1-cosx)

Difference of squares

1-cos^x

Pythagorean identity

sin^2x