sinsin square 12 + sin square 78 answer
Answers
Answered by
0
Answer:
sinsq12+sinsq72
sinsq(90-72)sq+sinsq72
cossq72+sinsq72
=1
Answered by
0
Answer:
=1
Step-by-step explanation:
sin square 12 + sin square 78
sin a = cos(90-a)
so,...
sin square 12 + cos ^2 (90-78)
that is equal to
sin^2 12 +cos^2 12
we have already an identity in
trignometry that ....
sin square theta + cos square theta =1
so by the equation the answer is 1
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