In trigonometry how we have to be prove that the sin(90_theta)=cos theta
Summi , 8 Years ago
Grade 9
Trigonometry> In trigonometry how we have to be prove t...
1 Answers
Arun
Dear student
sin (90-theta) = cos theta
sin 90 - sin theta = cos theta
sin 90 =1
1 - sin theta = cos theta
in rule: cos theta + sin theta = 1
cos theta = 1 - sin theta
cos theta = cos theta
sin 90 - sin theta = cos theta
sin 90 =1
1 - sin theta = cos theta
in rule: cos theta + sin theta = 1
cos theta = 1 - sin theta
cos theta = cos theta
Regards
Arun (askIITians forum expert)
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