Given that cos20∘−sin20∘=p , then what is the value of sin 40∘ ? View Solution If sinθ=cos(20∘+θ), then θ is equal to : View Solution The value of cos20∘cos40∘cos60∘cos80∘ is equal to View
View Solution The value ofcos20∘cos40∘cos60∘cos80∘is equal to View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparation and CBSE, ...
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For example :- sin 30 degrees and cos 60 degrees are equivalent because both results the same answer that is 1/2. Answer and Explanation: We are going to following trigonometric identities to find out the answer. {eq}\sin(90-\theta) =\cos \theta \ \...
Cos need to enable equal options.
题目Determine if True cos(120)=2cos(60) ( (cos)(120)=2(cos)(60)) 相关知识点: 试题来源: 解析 The left side ( -0.5) does not equal to the right side ( 1), which means that the given statement is false. False反馈 收藏
So, to find Cos(90): =Cos (90*Π/180) =Cos (Π/2) But here’s the catch!pi (Π)is an infinite decimal, so it will never return a definite value. Excel will cut this number at some point, thereby delivering a very slightly inaccurate result,6.12574E-17, which is not zero, but...
Prove: tan (30^o) = sin (60^o) / (1 + cos (60^o)) Prove that the following identity is true: (sin x)/(1 - cos x) + (sin x)/(1 + cos x) = 2 csc x Prove that -3 + 3i / -2 - 4i is equal to 3 sqrt(1)/10 (cos(4.39 + i sin...
Since cos(α) = b/c, from this definition it follows that the cosine of any angle is always less than or equal to one, and it can take negative values. The cosine of a 90-degree angle is equal to zero, since in order to calculate it we would need a triangle with two 90-degree...
According to Olsson (1961), it is a typical cold-water scallop of the Humboldt current, occurring most abundantly along the coast of Peru, southward from the Bay of Sechura. The distribution of A. purpuratus overlaps with that of the more northerly Argopecten ventricosus Sowerby (previously ...