Math, asked by SuratSat, 1 year ago

pls evaluate cos 9pi/4

Answers

Answered by udaysaikiran2001

cos(2π+π/4)
cos(π/4) =1/√2

udaysaikiran2001: 0.25

SuratSat: is there another way to solve it

udaysaikiran2001: u mean answer should be lengthy

SuratSat: no

udaysaikiran2001: ok i will try another process

SuratSat: we haven't studied the formula that cospi/4is 1/root2

SuratSat: thanx

udaysaikiran2001: cos 9π/4. = subtract 2π from 9π , A= 9π/4-2 then we get A = π/4 for value definition of cosine cos π/4 = √2/2/1 multiple numerator by reciprocal √2/2.1 hence 0.707106.

SuratSat: thanku so much

udaysaikiran2001: my pleasure

Answered by hello1939

$cos \: 9\pi \div 4$
cos(9×22)/(7×4)
=cos99/14
=cos 7.08
=0.9923934503
=approx. answer is 1

SuratSat: sorry but this is not the ans

hello1939: k sorry

Previous Question

Next Question

Similar questions

History, 6 months ago

हम तेरे बिन अब रह नहीं सकते तेरे बिना क्या वजूद मेरा? हम तेरे बिन अब रह नहीं सकते तेरे बिना क्या वजूद मेरा? तुझ से जुदा अगर हो जाएँगे तो ख़ुद से ही हो जाएँगे जुदा क्योंकि तुम ही हो, अब तुम ही हो ज़िंदगी अब तुम ही हो ओ-ओ-ओ, चैन भी, मेरा दर्द भी मेरी आशिक़ी अब तुम ही हो तेरा-मेरा रिश्ता है कैसा? एक पल दूर गवारा नहीं तेरे लिए हर रोज़ हैं जीते तुझ को दिया मेरा वक्त सभी कोई लमहा मेरा ना हो तेरे बिना...

Science, 6 months ago

suppose a boy is enjoying a ride in merry go round which is moving with a constant speed. it implies that the boy is: 1)At rest 2)moving with no acceleration 3)in acceleration motion 4)moving with information velocity...

Hindi, 6 months ago

जिस समास में दोनों पद प्रधान हो तथा उनके बीच और या तथा अथवा लोप हो उसे क्या कहते हैं...

English, 1 year ago

He took his father's hand and led him back to the table.( begin this sentence is taking his)...

Hindi, 1 year ago

What do we call arrangement in hindi...

Math, 1 year ago

factorise x to the power 6 minus 7 x cube minus 8...

Biology, 1 year ago

vesicles of pre-synaptic nodes contain what?

Hindi, 1 year ago

Sa upsarg wale shabd...