Ответ:
1.
cos² a+ sin²a=1
25/289+sin² a =1
sin a = √264 /17=2√66/17
tg a= sin a/cos a=2√66/5
ctg a=5/2√66 = 5√66/132
2.
LA-60°, LC-60°, LB-120°, LD-120°.
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
1.
cos² a+ sin²a=1
25/289+sin² a =1
sin a = √264 /17=2√66/17
tg a= sin a/cos a=2√66/5
ctg a=5/2√66 = 5√66/132
2.
LA-60°, LC-60°, LB-120°, LD-120°.