Question and Answers Forum

All Questions      Topic List

Trigonometry Questions

Previous in All Question      Next in All Question      

Previous in Trigonometry      Next in Trigonometry      

Question Number 217384 by MATHEMATICSAM last updated on 12/Mar/25

Prove that sin351° = − (√(((4 − (√(10 + 2(√5))))/8) .))

Provethatsin351°=−4−10+258.

Answered by Sutrisno last updated on 14/Mar/25

cos18°=((√(10+2(√5)))/4) sin351°=−sin9° =−(√((1−cos18°)/2)) =−(√((4−(√(10+2(√5))))/8))

cos18°=10+254sin351°=−sin9°=−1−cos18°2=−4−10+258

Terms of Service

Privacy Policy

Contact: info@tinkutara.com