Finished trigonometric functions (#21128)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21128
ghimport-source-id: d566de103f2aefc59e6423181de325d8f42620f4
Differential Revision: D15563190
Pulled By: Chillee
fbshipit-source-id: ad2e09cac5c7dae9978a7bd61098c2828620cdc4
