if cos thetha be a positive acute angle. then 5cos thetha +12 sin thetha =13 .then find cos. thetha
sahil573:
i think mine answer in wrong
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12sin the + 5cos the =13. 5costhe=13-12sinthe. costhe=13-12sinthe/5
ya it seems.... wrng
ya
ans should. be... 12/13 or 5/13 or 5/12 or 1/5. it's an mcq
Answered by
0
5(sin90- theta)+12sintheta=13
17sin90-theta=13
sin90-theta=13/17
17sin90-theta=13
sin90-theta=13/17
r u sure....
ans should be.. 12/13 or 5/13 or 5/12 or 1/5
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