Update src/instruct.jl

Co-authored-by: Leo <cacate0129@gmail.com>
QuantumBFS · Sep 26, 2020 · 5fa1395 · 5fa1395
1 parent bf9e875
commit 5fa1395
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/instruct.jl b/src/instruct.jl
@@ -356,7 +356,7 @@ function YaoBase.instruct!(
         (loc, )::Tuple{Int},
         theta::Number
     ) where {T, N}
-    a, b = cos(theta / 2), sin(theta / 2)
+    b, a = sincos(theta / 2)
     instruct_kernel(state, loc, 1 << (loc - 1), 1 << loc, a, -b, b, a)
     return state
 end