Question R10 Q1 - NSB MS 2014

If θ1 [theta sub 1] and θ2 [theta sub 2] are complementary angles then which of the following is always correct?

W) tanθ1 = - tanθ2 [tangent of theta sub 1 equals negative tangent of theta sub 2]

X) sinθ1 = sin θ2 [sine of theta sub 1 equals sine of theta sub 2]

Y) sinθ1 = cos θ2 [sine of theta sub 1 equals cosine of theta sub 2]

Z) cosθ1 = cos θ2 [cosine of theta sub 1 equals cosine of theta sub 2]

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