ICSE Class 10 Answered
No. 1:if each of a,b andc is a positive acute angle such that sin(a+b-c)=1/2;cos (b+c-a)=1/2 and tan(c+a-b)=1;then find the values of a, band c.
No.2:if a sec theta +b tan theta +c=0 and p sec theta +qtan theta +r =0 then prove that (br-qc)^2 -(pc-ar)^2=(aq-bp)^2
No. 3:sin^4 theta/a +cos^4 theta/b=1/a+b then prove that sin^8 theta/a^3 +cos^8 theta/b^3+1/(a+b)^3
NO.4: If sin x +sin^2 x=1 then find the value of cos^8 x +2cos^6 x+cos^4 x
(INDEX;^2 : means to the power of)
Asked by kmondaldgms | 16 Aug, 2018, 11:37: AM
Expert Answer
Answered by Arun | 17 Aug, 2018, 10:56: AM
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