If a + b=90 degree and a=2b then cosa×cosa + sinb×sinb equal to
Answers
Answered by
2
a+b = 90
2b+b =90
3b=90
b=30
a=60
cos a cos a + sinb sinb
cos 60 *cos 60+ sin 30 *sin 30
1/2*1/2+1/2*1/2
1/4+1/4
2/4
1/2
2b+b =90
3b=90
b=30
a=60
cos a cos a + sinb sinb
cos 60 *cos 60+ sin 30 *sin 30
1/2*1/2+1/2*1/2
1/4+1/4
2/4
1/2
Answered by
0
Hope u like the ans.. Plse Mark me as brainlist
Attachments:
Similar questions