fix bug in pico_float_test (#817)

diff --git a/test/pico_float_test/pico_float_test.c b/test/pico_float_test/pico_float_test.c
index 5da23d2..73dfbc3 100644
--- a/test/pico_float_test/pico_float_test.c
+++ b/test/pico_float_test/pico_float_test.c
@@ -403,7 +403,7 @@
         printf("FMODF %10.18f\n", check_close2(fmodf, x, 3.0f));
         sincosf(x, &s, &c);
         printf("SINCOS %10.18f %10.18f\n", s, c);
-        if (s != sin(x) || c != cos(x)) {
+        if (s != sinf(x) || c != cosf(x)) {
             printf("SINCOS mismatch\n");
             fail = true;
         }