Tan (- Wu + a) is equal to

Tan (a); because Wu is the period of the function tan

If cos α = - 35 and α∈ (π, 3 π 2), then Tan α=______ ．

Because α ∈ (π, 3 π 2), cos α = - 35, so sin α = - 45, so tan α = − 45 − 35 = 43, so the answer is: 43

Cos2a = 3 / 5 (3 / 2 π)

cos2a=2cosa^2-1
3/5+1=2cosa^2
So cosa = - 2 root 5 / 5
Draw a right triangle, Tana = root 5 / 2 root 5
=1/2
Because in the fourth quadrant, the value of Tana is negative, so Tana = - 1 / 2
If you don't understand, you are welcome to ask,

Tan (- Wu + a) is equal to

Tan (- Wu + a) is equal to

If cos α = - 35 and α∈ (π, 3 π 2), then Tan α=______ ．

Cos2a = 3 / 5 (3 / 2 π)

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