(iv) cos 20 in terms of cos 40 ;
Answers
Step-by-step explanation:
Express the rational number S=cos2(10∘)+cos2(20∘)+cos2(30∘)+...+cos2(80∘) in lowest terms
2cos400−cos200sin200=
Without using trigonometric tables, evaluate each of the following: sin2200+sin2700cos2200+cos2700+sin(900−θ)sinθtanθ+cos(900−θ)cosθcotθ +cos(400+θ)−sin(500−θ)+cos2400+cos2500sin2400+sin2500
Represent cos6θ in terms of cosθ.
Value of sin220∘+cos420∘sin420∘+cos220∘ is -
The value of sin220∘+cos420∘sin420∘+cos220∘ is
The value of sin220∘+cos420∘sin420∘+cos220∘ is
Representation of cos(A2),sin(A2) and tan(A2) in terms of cos A
The value of cos2(π20)+cos2(2π20)+cos2(3π4)+........+cos2(9π20) is
Express sin4θsinθ in terms of cos2θ and cosθ.
Express in terms of : cos−1(2x2−1) to cos−1x for −1≤x<0
Define y=cos−1(4x3−3x) in terms of cos−1x
∣∣∣cos70∘sin70∘sin20∘cos20∘∣∣∣=?
sin(40+θ).cos(10+θ)−cos(40+θ)sin(10+θ)=12
sin(40∘25')cos(19∘35')+cos(40∘25')sin(19∘35')=
if s=cos2α+cos2β then the value of cos(α+β).cos(α−β) in terms of s is
Find the value of Cos 3A in terms of cos A
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