Grade 11Trigonometry
if 1+sin a =9 cos a then 5(1-cos a)if 1+sin a =9 cos a & 0
if 1+sin a =9 cos a then 5(1-cos a)
if 1+sin a =9 cos a & 0
2 Answers
Vijay Mukati
Dear Student,
Please write your question clearly. Its not clearly formatted.
Thanks, Vijay
Please write your question clearly. Its not clearly formatted.
Thanks, Vijay
Vikas TU
Dear Yathisth,
as this question is uncleared i have answered this question.
check again,
1+sin a=9 cos a
Divide by cosa both sides, we get
seca + tana = 9
seca = 9 – tana
squaring both sides,
(seca)^2 = 81 + (tana)^2 – 18tana
1 + (tana)^2 = 8` + tana^2 – 18tana
tan a = 7/18
cosa = 18/root(49 + 18^2)
sina = 7/root(49 + 18^2)
now cross check with all the options.
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