Solve the equation for all real values of x.
cosxtanx- 2 cos²x = -1
a * +25k
+27k, 75 +23k
5 + Zick
* + 2nk, *** + 211k
Please select the best answer from the choices provided
ОА
OB
oc
OD
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if you use photomath right away it will give you the answer not like this app that you have to wait for people.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

9x