Evaluate cos39°. Cos51° +tan21°. Cot69°-sec²21°
Answers
Answered by
0
Answer:cos39°.cos(90°-39°) + tan21°.cot(90°-21°) - sec²21
= cos39°sin39° + tan²21° - sec°21
= cos39°sin39° - 1 [sec²theta - tan²theta = 1]
There must be problem in cos part
Mark me as brainliest
Similar questions